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Purl :: Purl (v. & n.) To rise in circles, ripples, or undulations; to curl; to mantle..

Ripple :: Ripple (n.) A little wave or undulation; a sound such as is made by little waves; as, a ripple of laughter..

Fluctuant :: Fluctuant (a.) showing undulation or fluctuation; as, a fluctuant tumor..

Undulatory :: Undulatory (a.) Moving in the manner of undulations, or waves; resembling the motion of waves, which successively rise or swell rise or swell and fall; pertaining to a propagated alternating motion, similar to that of waves..

Undulation :: Undulation (n.) The pulsation caused by the vibrating together of two tones not quite in unison; -- called also beat.

Phonograph :: Phonograph (n.) An instrument for the mechanical registration and reproduction of audible sounds, as articulate speech, etc. It consists of a rotating cylinder or disk covered with some material easily indented, as tinfoil, wax, paraffin, etc., above which is a thin plate carrying a stylus. As the plate vibrates under the influence of a sound, the stylus makes minute indentations or undulations in the soft material, and these, when the cylinder or disk is again turned, set the plate in vibration

Relief :: Relief (n.) The elevations and surface undulations of a country.

Undulate :: Undulate (v. i.) To move in, or have, undulations or waves; to vibrate; to wave; as, undulating air..

Stylus :: Stylus (n.) That needle-shaped part at the tip of the playing arm of phonograph which sits in the groove of a phonograph record while it is turning, to detect the undulations in the phonograph groove and convert them into vibrations which are transmitted to a system (since 1920 electronic) which converts the signal into sound; also called needle. The stylus is frequently composed of metal or diamond..

Crimp :: Crimp (v. t.) To fold or plait in regular undulation in such a way that the material will retain the shape intended; to give a wavy appearance to; as, to crimp the border of a cap; to crimp a ruffle. Cf. Crisp..

Ripple :: Ripple (v. i.) To become fretted or dimpled on the surface, as water when agitated or running over a rough bottom; to be covered with small waves or undulations, as a field of grain..

Ripple :: Ripple (v. t.) To fret or dimple, as the surface of running water; to cover with small waves or undulations; as, the breeze rippled the lake..

Undulation :: 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..

Curl :: Curl (v. i.) To move in curves, spirals, or undulations; to contract in curving outlines; to bend in a curved form; to make a curl or curls..

Undulative :: Undulative (a.) Consisting in, or accompanied by, undulations; undulatory..

Fluctuation :: Fluctuation (n.) The motion or undulation of a fluid collected in a natural or artifical cavity, which is felt when it is subjected to pressure or percussion..

Undulation :: Undulation (n.) A wavy appearance or outline; waviness.

Undulate :: Undulate (v. t.) To cause to move backward and forward, or up and down, in undulations or waves; to cause to vibrate..

Scroll :: Scroll (n.) An ornament formed of undulations giving off spirals or sprays, usually suggestive of plant form. Roman architectural ornament is largely of some scroll pattern..

Undulation :: Undulation (n.) 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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