• WordNet 3.6
    • adj effective existing in fact; not theoretical; real "a decline in the effective demand","confused increased equipment and expenditure with the quantity of effective work done"
    • adj effective able to accomplish a purpose; functioning effectively "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw","effective personnel","an efficient secretary","the efficient cause of the revolution"
    • adj effective exerting force or influence "the law is effective immediately","a warranty good for two years","the law is already in effect (or in force)"
    • adj effective producing or capable of producing an intended result or having a striking effect "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford","effective teaching methods","effective steps toward peace","made an effective entrance","his complaint proved to be effectual in bringing action","an efficacious law"
    • adj effective works well as a means or remedy "an effective reprimand","a lotion that is effective in cases of prickly heat"
    • adj effective ready for service "the fort was held by about 100 effective soldiers"
    • ***

Additional illustrations & photos:

Effect of Gladstonianism. Balfourism. Healyism Effect of Gladstonianism. Balfourism. Healyism

Webster's Revised Unabridged Dictionary
  • Interesting fact: It has been medically been proven that laughter is an effective pain killer
    • a Effective Having the power to produce an effect or effects; producing a decided or decisive effect; efficient; serviceable; operative; as, an effective force, remedy, speech; the effective men in a regiment. "They are not effective of anything, nor leave no work behind them.""Whosoever is an effective , real cause of doing his heighbor wrong, is criminal."
    • Effective One who is capable of active service. "He assembled his army -- 20,000 effectives at Corinth."
    • Effective (Com) Specie or coin, as distinguished from paper currency; -- a term used in many parts of Europe.
    • Effective That which produces a given effect; a cause.
    • Effective The serviceable soldiers in a country; an army or any military body, collectively; as, France's effective .
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The substance that gives red wine and dark beer its color is said to have a positive effects on cholesterol and blood pressure
    • effective Serving to effect the intended purpose; producing the intended or expected effect or result; operative; efficacious: as, an effective cause; effective proceedings.
    • effective Capable of producing effect; fit for action or duty; adapted for a desired end: as, the effective force of an army or of a steam-engine is so much; effective capacity.
    • effective Serving to impress or affect with admiration; producing a decided impression of beauty or a feeling of admiration at the first presentation; impressive; striking; specifically, artistically strong or successful: as, an effective performance; an effective picture.
    • effective Actual; real.
    • n effective The number of men actually doing duty, or the strength of a company, a regiment, or an army, in the field or on parade.
    • n effective A soldier fit for duty.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Passion fruits have a tranquilizing effect on the body
    • Effective having power to effect: causing something: powerful: serviceable
    • ***


  • Miguel De Cervantes
    “Take away the cause, and the effect ceases.”
  • Elizabeth Stuart Phelps
    Elizabeth Stuart Phelps
    “It is not the straining for great things that is most effective; it is the doing the little things, the common duties, a little better and better.”
  • William Shakespeare
    “Thought are but dreams till their effects are tried.”
  • Ellen Key
    Ellen Key
    “The educator must above all understand how to wait; to reckon all effects in the light of the future, not of the present.”
  • Michael Leboeuf
    Michael Leboeuf
    “The ultimate goal of a more effective and efficient life is to provide you with enough time to enjoy some of it.”
  • L. Ron Hubbard
    L. Ron Hubbard
    “A person is either the effect of his environment or is able to have an effect upon his environment.”


Webster's Revised Unabridged Dictionary
L. effectivus,: cf. F. effectif,
Chambers's Twentieth Century Dictionary
Fr.,—L. efficĕre, effectum, to accomplish—ex, out, facĕre, to make.


In literature:

With some reagents the full effect takes place almost instantaneously, while with others the effect takes place slowly.
"Response in the Living and Non-Living" by Jagadis Chunder Bose
This effort had an effect, but Italy was not Russia.
"Kelly Miller's History of the World War for Human Rights" by Kelly Miller
This not only has a pronounced effect upon the purification of the blood but it likewise has a tonic effect upon the nervous system.
"Vitality Supreme" by Bernarr Macfadden
This message produced no effect in favour of the bill which lay neglected on the table.
"The History of England in Three Volumes, Vol.II. From William and Mary to George II." by Tobias Smollett
Some of the Rationalists were naturally men of admirable temperament, but this was no effect of their faith.
"History of Rationalism Embracing a Survey of the Present State of Protestant Theology" by John F. Hurst
The effect is due to improved climatic conditions.
"Talks on Manures" by Joseph Harris
On the floor there were some rather good and very effective Oriental rugs.
"The Way of Ambition" by Robert Hichens
By the joint effect of these two causes, a large effect is in time produced.
"Applied Eugenics" by Paul Popenoe and Roswell Hill Johnson
There is also often an irritant effect on the mucous membranes of eyes from the direct effect of the smoke.
"How to Live" by Irving Fisher and Eugene Fisk
We shall describe, first, the local effects, then the general effects, physical and mental.
"Plain Facts for Old and Young" by John Harvey Kellogg
But we, for our part, cannot stop at a cause and its immediate effect; for we know that this effect may in its turn become itself a cause.
"Sophisms of the Protectionists" by Frederic Bastiat
Physiologists differ as to its effect upon health.
"Human Foods and Their Nutritive Value" by Harry Snyder
This unshapely block produced a great effect upon Mess Lethierry's imagination.
"Toilers of the Sea" by Victor Hugo
This had the effect to check the tide of pursuit, and give the fugitives time to rally.
"History of the Reign of Philip the Second, King of Spain." by William H. Prescott
Study of its effects on the individual is needed to determine its effects on the race.
"Degeneracy" by Eugene S. Talbot
The effective gun-fire from submarines is several miles and torpedoes can be effective at these distances.
"Visual Illusions" by Matthew Luckiesh
It is this shading which gives so admirably the effect of light shining on a convex surface.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
Betty's challenge had had its effect.
"The Trail of the Axe" by Ridgwell Cullum
In October 1635 Witherings, having completed the necessary arrangements, proceeded to carry his plan into effect.
"The History of the Post Office" by Herbert Joyce
They form our effective desires and they furnish us with our working capacities.
"Human Nature and Conduct" by John Dewey

In poetry:

Thy Father could.
Quickly effect, what thou dost move;
For he is Power: and sure he would;
For he is Love.
"The Method" by George Herbert
By some sorcery 't was effected,
For those Christians use enchantments,
And then miracles pretend them.
"The Two Lovers Of Heaven: Chrysanthus And Daria - Act I" by Denis Florence MacCarthy
The rolling planets thou madest move,
By thy effective will;
And the revolving globes above
Their destined cours fulfil.
"Hymn To God's Power" by James Thomson
It bringeth good, it bringeth ill,
As he possessing shall elect.
He maketh it of none effect
Who walketh not within thy will.
"Invocation" by Ambrose Bierce
Else should our souls in vain elect,
And vainer yet were heaven's laws,
When to an everlasting cause
They gave a perishing effect.
"An Ode Upon a Question Moved, Whether Love Should Continue Forever" by Lord Edward Herbert of Cherbury
Next, what by law I'm bound unto,
The same the gospel makes me do:
What preceptively that can crave;
This effectively can ingrave.
"The Believer's Principles : Chap. II." by Ralph Erskine

In news:

Merck's Adherence Estimator survey can help health care professionals counsel patients more effectively.
As SB1070 takes effect, Mexicans say ' Adios , Arizona'.
Arizona immigration law targeting immigrants has already encouraged Mexicans to begin returning home, even as a US judge halted key portions of SB1070 from taking effect.
Some researchers have found that adjuncts have a negative effect on students because adjuncts are less accessible.
Non-pharmacological behavioural adjuncts have been suggested as efficient safe means in reducing discomfort and adverse effects during medical procedures.
Receiving a Compliment has Same Positive Effect as Receiving Cash.
Denver and its suburbs are in a building boom that has been dubbed "supergrowth," and the negative effect in terms of lost historic buildings is reaching a critical mass.
They had a therapeutic effect at a time when the nation was hurting in a profound way.
That is a fancy way of saying that agave syrup is believed to have a less intense effect on blood sugar levels.
Pop culture still hasn't fully digested its effects.
Spare-the- Air alert s are in effect throughout Northern California and Western Nevada for the first time this winter.
Mass Effect Infiltrator and Mass Effect Datapad available on the App Store.
To preview an effect in Final Cut Pro X, first move the playhead over the clip you want to see the effect applied to so that it appears in the Viewer.
What are the positive effects on communication and the negative effects on verified facts.
Version 6 software for Congo and Congo jr consoles from ETC features a new image effects function that uses the effect playback concept from v5 software to associate a layout of channels with a source image or text.

In science:

Only a very large detector will have an event rate that is sufficiently high to detect with statistical confidence the day-night effect with solar neutrinos, an effect which is a characteristic signal of matter-induced neutrino oscillations (the MSW effect).
Solar models and solar neutrino oscillations
And since it can be proved that no preferred-frame effect does occur for the gravitational effects on light rays, one indeed obtains the same predictions for those effects as the ones deduced in general relativity (GR) from the standard Schwarzschild metric .
Scalar ether theory of gravity: a modification that seems needed
Relation among effective hadron masses, effective interactions and equation of state are studied using a generalized mean-field theory which includes the implicit and the explicit density dependence of the effective masses and couplings.
Effective hadron masses and effective interactions in nuclear matter
They also showed that the reduction of the effective ω -nucleon coupling is related with the enhancement of the effective ω -meson mass if it is caused by the effective multi ω -nucleon interaction.
Effective hadron masses and effective interactions in nuclear matter
Next we examine the effects of the explicit density dependence in the In parameter set ED1, g∗ effective interactions. vω decreases as density increases because of the effective interaction ¯ψgωV 2ωV 2γ0ψ .
Effective hadron masses and effective interactions in nuclear matter
The Hall effect in magnetic materials includes, in addition to an ordinary (or regular ) Hall effect (OHE), which originates from the Lorentz force and depends on the magnetic induction B, an extraordinary (or anomalous ) Hall effect (EHE), which depends on the magnetization M.
Testing the Berry phase model for extraordinary Hall effect in SrRuO3
They do not calculate temperature effects; the nonlocal anomalous skin effect for ω < ωp that they compute gives a correction to the Casimir force of order 0.5%, but other nonlocal effects, such as plasmon excitations, could be more significant [138, 139].
The Casimir effect: Recent controversies and progress
In this analogy, S plays the role of an effective entropy, T plays the role of an effective temperature and F plays the role of an effective free energy.
Dynamics and thermodynamics of a simple model similar to self-gravitating systems: the HMF model
Effective recombination coefficients by Escalante & Victor (1990). b Effective recombination coefficients by P´equignot et al. (1991). c Effective recombination coefficients by Kisielius & Storey (2002).
A reappraisal of the chemical composition of the Orion nebula based on VLT echelle spectrophotometry
The model prowhich are believed to be similar to the Sun’s, the finding of poses a unified picture of both the FIP and inverse FIP a transition from inverse FIP to solar-like FIP effect with effects by exploring the effects on the upper chromospheric decreasing activity level appears to be robust.
X-rays of Stellar Coronae with Chandra and XMM-Newton: Flares and Elemental Composition in Stellar Atmospheres (Invited review)
At present, the cosmological studies of mν are still model-dependent due to systematic effects such as biasing, parameter degeneracy, possible selection effects, possible contributions from non-linear effects and the strong influence of priors on the neutrino mass results.
Neutrinoless double beta decay and direct searches for neutrino mass
We stick to the meanings of the terms as in the following: a factor has a main effect, two factors have a 2-factor interaction (effect), three factors have a 3-factor interaction (effect) and so on.
A general theory of minimum aberration and its applications
The effective chemical potential ∆µ value is due to the effects of finite size , the energetic contributions from Coulomb and isospin, angular momentum, other nuclear effects (e.g. etc.) and the Coulombic contributions to σinv .
Compound nuclear decay and the liquid to vapor phase transition: a physical picture
Saturation effects are most easily studied in the coordinate space representation in which it has been difficult to include non-leading effects, and the non-leading effects have mainly been studied in momentum space, where it is hard to include saturation.
Small x Phenomenology - summary of the 3rd Lund Small x Workshop in 2004
Instead, unknown higher order QCD terms, the effects of target masses and nonperturbative effects (“higher twists”) could cause similar effects as those predicted by asymptotic freedom.
Experimental Tests of Asymptotic Freedom