• WordNet 3.6
    • adj theoretical concerned primarily with theories or hypotheses rather than practical considerations "theoretical science"
    • adj theoretical concerned with theories rather than their practical applications "theoretical physics"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: You know the three physical dimensions, and the fourth dimension, time. For years, people have speculated about other dimensions. Experts in theoretical physics now say the major theories about the universe make sense together - and all the math seems to work - if there are 10 dimensions.
    • a Theoretical Pertaining to theory; depending on, or confined to, theory or speculation; speculative; terminating in theory or speculation: not practical; as, theoretical learning; theoretic sciences.
    • ***
Century Dictionary and Cyclopedia
    • theoretical In chem., indicating the analytical values or other properties which should be obtained from a compound provided the correct conception (theory) of its composition has been formed.
    • theoretical Having the object of knowledge (θεωρητόν) as its end; concerned with knowledge only, not with accomplishing anything or producing anything; purely scientific; speculative. This is the original, proper, and best meaning of the word. Aristotle divides all knowledge into productive (art) and unproductive (science), and the latter into that which aims at accomplishing something (practical science) and that which aims only at understanding its object, which is theoretical science. This distinction, which has descended to our times (but with practical science and art joined together), diminishes in importance as science advances, all the sciences finding practical applications.
    • theoretical Dealing with or making deductions from imperfect theory, and not correctly indicating the real facts as presenting themselves in experience. All the practical sciences that have been pursued with distinguished success proceed by deductions from hypotheses known not to be strictly true. This is the analytical method, of which modern civilization is the fruit. In some cases the hypotheses are so far from the truth that the results have to receive corrections. In such cases the uncorrected result is called theoretical, the corrected result practical.
    • theoretical In Kantian terminology, having reference to what is or is not true, as opposed to practical, or having reference to what ought or may innocently be done or left undone.
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Chambers's Twentieth Century Dictionary
    • adjs Theoretical pertaining to theory: not practical: speculative
    • ***


  • William James
    “Faith means belief in something concerning which doubt is theoretically possible.”
  • Auguste Comte
    Auguste Comte
    “Each department of knowledge passes through three stages. The theoretic stage; the theological stage and the metaphysical or abstract stage.”
  • William Pitt
    William Pitt
    “Theoretical principles must sometimes give way for the sake of practical advantages.”


Webster's Revised Unabridged Dictionary
Gr. : cf. L. theoreticus, F. théorétique,
Chambers's Twentieth Century Dictionary
Gr. theōrēmatheōrein, to view—theasthai, to see.


In literature:

Besides being false theoretically, this method of investing phantom columns with real strength is wofully lacking in practical foundation.
"Some Mooted Questions in Reinforced Concrete Design" by Edward Godfrey
Continually it is expressed also, and this even by writers who theoretically repudiate it.
"Is Life Worth Living?" by William Hurrell Mallock
They are theoretic rather than demonstrative, and the weight of evidence is against them.
"Companion to the Bible" by E. P. Barrows
Theoretically city public schools are good enough for anybody's children.
"If You're Going to Live in the Country" by Thomas H. Ormsbee and Richmond Huntley
My difficulty is practical, not theoretical.
"Explanation of Catholic Morals" by John H. Stapleton
The theoretical supremacy of the Empire prevented any other authority from taking the first place in Italy.
"Sketches and Studies in Italy and Greece, Complete" by John Symonds
There was theoretical writing about freedom.
"Germany and the Germans" by Price Collier
It is for this reason that I object, theoretically, to sowing wheat after barley.
"Talks on Manures" by Joseph Harris
His disciples who had theoretical interests in the matter, no doubt noted the contradictions.
"History of Dogma, Volume 1 (of 7)" by Adolph Harnack
"Voice Production in Singing and Speaking" by Wesley Mills
Brandon claimed that such a thing was theoretically possible, but Westfall and I couldn't see it.
"Spacehounds of IPC" by Edward Elmer Smith
He is responsible for the theoretical and practical training of the battalion.
"Infantry Drill Regulations, United States Army, 1911" by United States War Department
It was one place where theoretical searchers could expect her to show up.
"Legacy" by James H Schmitz
Thus a theoretical head (with the beginnings of the organs of sense), and a long-drawn-out tail, would have their origin.
"The Log of the Sun" by William Beebe
I refer to the Gewerbeschulen, where theoretical lessons are sometimes taught.
"The Condition and Tendencies of Technical Education in Germany" by Arthur Henry Chamberlain
As I have hinted, in all real contraries it is theoretically possible to accept either the one or the other.
"The Religious Sentiment" by Daniel G. Brinton
Theoretically, this should be done within a day or two with all cases except the very gravest.
"The Note-Book of an Attache" by Eric Fisher Wood
His theoretical supremacy was thus limited by the unyielding facts of geography.
"The Fighting Governor" by Charles W. Colby
The scientist then formulates it in an abstract theoretic statement, and thus concludes his work.
"Materials and Methods of Fiction" by Clayton Hamilton
Plato was not himself deceived as to the theoretical insufficiency of his arguments.
"A History of Philosophy in Epitome" by Albert Schwegler

In poetry:

From others, judgment of that hue
Which over-hope
Breeds from a theoretic view
Of regal scope.
"A King's Soliloquy [On the Night of His Funeral]" by Thomas Hardy
on theoretical considerations and
the jealous spiritualities of the abstract
the robot? they're smoke, billows above
the physical event. They have burned up.
See how free we are! as a nation of persons.
"On Seeing Larry Rivers' Washington Crossing The Delaware At The Museum Of Modern Art" by Frank O Hara

In news:

Theoretically, Roy Grimes of Lubbock can make an arrest for the next year in Fort Worth because of his ancestry.
Effective Lumens Raw lumens are a theoretical measure that fails to account for real world losses.
Real tension over theoretical war.
Brian Greene does theoretical physics and Hollywood as well.
The price of a crunchy treat that also (theoretically) protects your most precious of mobile gadgets.
If they match the offer sheet, they can theoretically have a $102.5 million payroll for 2014-15, with a tax bill that exceeds $100 million.
Page 1 of 2 Scrapping vRAM licensing is VMware's latest response to the competitive threats from Microsoft, Citrix and others, which were once theoretical but are now coming up quickly in its rearview mirror.
Theoretically, the workload required to raise kids alone should be twice as heavy as when two parents are present.
My job as a theoretical physicist is to try to understand how particles and forces conspire to create the world we know, which includes phenomena that can't be explained if the particles we've observed are the end of the story.
However tiny or remote the threat of inflation may be, it theoretically exists.
Restoration of trolley service in the corridor remains theoretically possible.
The Division's Journal of Theoretical & Philosophical Psychology is sent to members quarterly.
Western philosophers, theologians and even theoretical scientists are being drawn to Hindu teachings.
Student Engagement in Higher Education: Theoretical Perspectives and Practical Approaches for Diverse Populations will be released next Tuesday (8/26) by Routledge Publishers.
Titan, according to Oak Ridge 's announcement, is 10 times more powerful than its predecessor, Jaguar, with a theoretical peak performance of 20 petaflops, or 20,000 trillion calculations per second.

In science:

In summary, a theoretical framework is presented that predicts the RLP and RCP limits of a system of polydisperse spheres and brings together distinct results into a common theoretical framework.
Model of random packings of different size balls
This model plays a fundamental role in nonequilibrium statistical physics as a testbed to assess new theoretical advances, and represents at a coarsegrained level a large class of diffusive systems of technological and theoretical interest [7, 8].
Symmetries in Fluctuations Far from Equilibrium
Universality: From Theoretical Computer Science to Theoretical Physics.
Partitioned quantum cellular automata are intrinsically universal
It could be said that theoretical physics has aided theoretical computer science via this path.
Partitioned quantum cellular automata are intrinsically universal
Though all evidence is subject to theoretical interpretation, italics indicate exclusively theoretical arguments.
Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
Game-theoretic reasoning is used to analyze how agents interact with a mechanism, a desirable criterion being stability according to some game-theoretic solution concept.
Simplicity-Expressiveness Tradeoffs in Mechanism Design
In Section 2, we recall the notion of random measure-theoretical entropy, introduce the notions of random measure-theoretical entropy and topological entropy for covers and give the relationship of them.
A local variational principle for random bundle transformations
Low values of P (x < K ) would mean that the empirical CDF of the samples matches the theoretical one too wel l, i.e. even better than samples drawn directly from the theoretical distribution.
Application of the Kolmogorov-Smirnov test to CMB data: Is the universe really weakly random?
We start by defining the relevant algebraic and graph-theoretic structures. (See e.g. for additional information about some of the graph-theoretic terms used here.) A directed graph E = (E 0 , E 1 , r, s) consists of two sets E 0 , E 1 , together with functions s, r : E 1 → E 0 , called source and range, respectively.
Simple Lie algebras arising from Leavitt path algebras
The theoretical curve on Fig. 2c (shaded region) is based on the same model used for the theoretical curve in Fig. 2b.
Heralded quantum entanglement between two crystals
Theoretical line databases. Servers containing theoretical spectral lines will be included in this group.
IVOA Recommendation: Simple Line Access Protocol Version 1.0
The PDF formulation in §2 provides a general theoretical framework, and, to complete the theoretical approach, we will consider several existing closure models for the diffusivity term in eq. (2.2).
The Pollution of Pristine Material in Compressible Turbulence
Among these theories, Poincar´e gauge theory (PGT) has a solid theoretical motivation, which tries to bring the gravity into the gauge-theoretic framework.
Torsion Cosmology of Poincar\'e gauge theory and the constraints of its parameters via SNeIa data
Addressing the full theoretical uncertainty associated with the total t¯t crosssection as currently known, we conclude that we see no evidence for a strong reduction of the theoretical uncertainty compared to the long-ago established NLO+NLL analysis.
Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
Number Theoretic Transforms are also a type of discrete Fourier transforms. The Number theoretic transform is based on generalizing the nth primitive root of unity to a quotient ring instead of using complex numbers.
Randomization Using Quasigroups, Hadamard and Number Theoretic Transforms