UNDULATION • DICTIONARY ONE.COM • Definition of Undulation

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noun

Undulation n.

The act of undulating; a waving motion or vibration; as, the undulations of a fluid, of water, or of air; the undulations of sound.

A wavy appearance or outline; waviness.

(Mus.)

(a)

The tremulous tone produced by a peculiar pressure of the finger on a string, as of a violin.

(b)

The pulsation caused by the vibrating together of two tones not quite in unison; called also beat.

(Physics) A motion to and fro, up and down, or from side to side, in any fluid or elastic medium, propagated continuously among its particles, but with no translation of the particles themselves in the direction of the propagation of the wave; a wave motion; a vibration.

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Etymology of 'Undulation'

Collaborative International Dictionary of English 0.48

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"Undulation" Quotes from Famous Books

... movements of the auricles and ventricles, is a model of accurate description, to which little has since been added. It is interesting to note that he mentions what is probably auricular fibrillation. He says: "After the heart had ceased pulsating an undulation or palpitation remained in the blood itself which was contained in the right auricle, this being observed so long as it was imbued with heat and spirit." He recognized too the importance of the auricles as the first to move and ...

— The Evolution of Modern Medicine • William Osler

... rapidly, partly from the undulation of the earth when a heavy train passes over it at a high velocity, but chiefly from the resistance of the atmosphere and blast pipe, which constitute the greatest of the impediments to motion at high speeds. At a speed of 30 miles an hour, the atmospheric resistance has been ...

— A Catechism of the Steam Engine • John Bourne

... we viewed them, looks very much like Beacon Street, in Boston, bordering on the Common, allowing for a considerable enlargement of scale in favor of the Park residences. The Park, however, has not the beautiful elms that overshadow Boston Common, nor such a pleasant undulation of surface, nor the fine off-view of the country, like that across Charles River. I doubt whether London can show so delightful a spot as that Common, always excepting the superiority of English lawns, which, however, is not so evident in the London parks, there being less care bestowed on ...

— Passages From the English Notebooks, Complete • Nathaniel Hawthorne

... the miraculous, which at once obliterates the connection between cause and effect, which it is the peculiar province of physical science to develop. Let us take another view. The present doctrine of light teaches that light is an undulation of an elastic medium necessarily filling all space; and this branch of science probably rests on higher and surer grounds than any other. Every test applied to it by the refinements of modern skill, strengthens its claims. Here then the Newtonian vacuum is no longer a void. If we get over this ...

— Outlines of a Mechanical Theory of Storms - Containing the True Law of Lunar Influence • T. Bassnett

... William Sturgis; their pliant grace, as facile as grain rippling before the wind, would have put the best ballet in Europe to the blush. Concha's skirts swept Rezanov's feet, her little slippers twinkled before his admiring eyes, and he lost no sinuous turn or undulation of her beautiful figure; but she never ...

— Rezanov • Gertrude Atherton

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