and-fro motion
51fluid mechanics — an applied science dealing with the basic principles of gaseous and liquid matter. Cf. fluid dynamics. [1940 45] * * * Study of the effects of forces and energy on liquids and gases. One branch of the field, hydrostatics, deals with fluids at… …
52swing — swing1 swingable, adj. /swing/, v., swung, swinging, n., adj. v.t. 1. to cause to move to and fro, sway, or oscillate, as something suspended from above: to swing one s arms in walking. 2. to cause to move in alternate directions or in either… …
53swing — I. verb (swung; swinging) Etymology: Middle English, to beat, fling, hurl, rush, from Old English swingan to beat, fling oneself, rush; akin to Old High German swingan to fling, rush Date: 13th century transitive verb 1. a. to cause to move… …
54musical sound — Introduction any tone with characteristics such as controlled pitch and timbre. The sounds are produced by instruments in which the periodic vibrations can be controlled by the performer. That some sounds are intrinsically musical,… …
55wave — waveless, adj. wavelessly, adv. wavingly, adv. wavelike, adj. /wayv/, n., v., waved, waving. n. 1. a disturbance on the surface of a liquid body, as the sea or a lake, in the form of a moving ridge or swell. 2. any surging or progressing movement …
56Oscillation — (Roget s Thesaurus) >Reciprocating motion, motion to and fro. < N PARAG:Oscillation >N GRP: N 1 Sgm: N 1 oscillation oscillation Sgm: N 1 vibration vibration libration Sgm: N 1 motion of a pendulum motion of a pendulum Sgm: N 1 nutation… …
57rock — rock1 rockless, adj. rocklike, adj. /rok/, n. 1. a large mass of stone forming a hill, cliff, promontory, or the like. 2. Geol. a. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable… …
58shake — shakable, shakeable, adj. /shayk/, v., shook, shaken, shaking, n. v.i. 1. to move or sway with short, quick, irregular vibratory movements. 2. to tremble with emotion, cold, etc. 3. to become dislodged and fall (usually fol. by off …
59shake — I. verb (shook; shaken; shaking) Etymology: Middle English, from Old English sceacan; akin to Old Norse skaka to shake Date: before 12th century intransitive verb 1. to move irregularly to and fro 2. to vibrate especially as the result of a blow… …
60swing — [[t]swɪŋ[/t]] v. swung, swing•ing, 1) to cause to move to and fro or oscillate, as something suspended from above 2) to cause to move or turn in alternate directions or in either direction on a fixed point or axis, as a door on hinges 3) to move… …
