• Webster's Revised Unabridged Dictionary
    • a Perturbative Tending to cause perturbation; disturbing.
    • ***
Century Dictionary and Cyclopedia
    • perturbative Causing or tending to cause perturbation; disturbing.
    • ***


In literature:

They didn't want HIM to be perturbed.
"On the Track" by Henry Lawson
He walked to the window in evident perturbation.
"Night and Day" by Virginia Woolf
Nevertheless, even in my present state of perturbation, I protest that I feel happy.
"Twenty Years After" by Alexandre Dumas, Pere
Bechamel went back to the Angel, perturbed.
"The Wheels of Chance" by H. G. Wells
Feversham, however, chanced to observe that this man who had shown himself hitherto so calm looked suddenly most singularly perturbed.
"Mistress Wilding" by Rafael Sabatini
My hunger was forgotten; the garret to which I must return to pass the night never perturbed my thoughts.
"The Private Papers of Henry Ryecroft" by George Gissing
He was inattentive, and I perceived that he was profoundly perturbed.
"Chance" by Joseph Conrad
The inferior race had conquered the superior, disorganizing the country and perturbing the world.
"The Four Horsemen of the Apocalypse" by Vicente Blasco Ibanez
If Osmonde were here, how perturbed he would be!
"A Lady of Quality" by Frances Hodgson Burnett
Then the allusion to Mary perturbed the sailor.
"The Grey Room" by Eden Phillpotts

In poetry:

How I am pleased with thee, sweet girl! But do
Shake off this perturbation, be not anxious,
Be not alarmed, I want to hear thee talk -
Be cheerful.
"Nathan The Wise - Act V" by Gotthold Ephraim Lessing
These perturbations, this perpetual jar
Of earthly wants and aspirations high,
Come from the influence of an unseen star,
An undiscovered planet in our sky.
"Haunted Houses. (Birds Of Passage. Flight The First)" by Henry Wadsworth Longfellow
All summer cannot quicken it with heat,
Nor Spring perturb it with a budding bough,
Nor all the glittering devils of the sleet
In snowing Winter rack its quiet now.
"The Golden Corpse" by Stephen Vincent Benet
And knowing it alone through perturbation
And vague disquiet of another star,
They named it, till the day of revelation,
"The Dark Companion" — darkly guessed afar.
"The Dark Companion" by James Brunton Stephens
Is put to fair devising in the curb
Of ordered limit; and all-changeful Hermes
Is Terminus as well. Yet we perturb
Our souls for latitude, whose strength in bound and term is.
"The Cloud's Swan-Song" by Francis Thompson
"To-day my soul clasps Form; but where is my troth
Of yesternight with Tune: can one cleave to both?"
- "Be not perturbed," said she. "Though apart in fame,
As I and my sisters are one, those, too, are the same.
"Rome: The Vatican-Sala Delle Muse." by Thomas Hardy

In news:

Researchers Provide Systems-Level Dissection of Regulatory Perturbations in Cancer.
A worried-looking Demi Moore looks perturbed in between takes on the set.
Kinases have been the target of extensive research, and there has been significant interest in developing assays that measure the endogenous activities of kinases and their perturbation by small molecules.
At one heated point in Monday night's South Carolina Democratic debate, a perturbed Barack Obama finally blurted out to Hillary Clinton what millions of others have been thinking these past weeks.
And an internationally acknowledged expert on the applied- mathematics technique known as perturbation, died April 17 at Albany Medical Center Hospital.
You know the one — full-sized American steel with a low-profile tow rack in the bed, the claws of which protrude out of the tailgate like a perturbed crab looking to pinch pinch a car.
Perturbations to their structures caused by mysterious rocketing objects.
Those perturbations tip the researchers that a sunspot is forming.
Our company recently implemented a policy that has quite a few people perturbed, myself included.
Mention nurses in the Bay Area these days and two images come to mind: a caring, nurturing professional at a patient's bedside, and a perturbed, bullhorn carrying protester walking a picket line.
I was both pleased and perturbed by the "On the Runway" story in the Sunday New York Times Style section on January 30th.
Preseason or not, there's nothing easier to predict than Rick Carlisle being perturbed after a poor defensive performance.
NBA Playoff primer, plus a pick that might perturb you.
Baseball Stadiums' Peanut -Free Seating Perturbs Some Fans.
Councilmember Daniel Dromm says he is perturbed by the pigeon poop problem casting a shadow over the 74th Street station on Roosevelt Avenue, which hosts the No.

In science:

Since as shown later, the action variable perturbations and the angle variable perturbations are bounded by t0 , t respectively, the difference between the original perturbation variables and the transformed perturbation variables is bounded by some positive constant.
Evolution of Cosmological Perturbations in the Universe dominated by Multiple Scalar Fields
Early evolution of perturbations can be studied analytically using perturbation theory and approximation schemes. A detailed study of non-linear evolution of density perturbations requires the use of numerical simulations.
A Parallel TreePM Code
Once the close relationship between the perturbative and Mayer cluster expansions is appreciated, it reasonably to ask for what classes of problems a perturbative expansion might be useful. A perturbative description of a classical fluid is useful only for models with relatively soft or long-range pair interactions.
Diagrammatic analysis of correlations in polymer fluids: Cluster diagrams via Edwards' field theory
It is interesting to note that the Zel’dovich approximation is the first term of a perturbative series; the perturbed quantity is not the density, as in Eulerian perturbation theory, but the displacement of the particles from the initial position.
On the cosmological mass function theory
The Zel’dovich approximation is the first term of a perturbative series; the perturbed quantity is not the density, as in Eulerian perturbation theory, but the displacement of the particles from the initial position.
On the cosmological mass function theory