and-fro motion
31Positive rotation — Positive Pos i*tive, a. [OE. positif, F. positif, L. positivus. See {Position}.] 1. Having a real position, existence, or energy; existing in fact; real; actual; opposed to negative. Positive good. Bacon. [1913 Webster] 2. Derived from an object… …
32Positive sign — Positive Pos i*tive, a. [OE. positif, F. positif, L. positivus. See {Position}.] 1. Having a real position, existence, or energy; existing in fact; real; actual; opposed to negative. Positive good. Bacon. [1913 Webster] 2. Derived from an object… …
33vitreous electricity — Positive Pos i*tive, a. [OE. positif, F. positif, L. positivus. See {Position}.] 1. Having a real position, existence, or energy; existing in fact; real; actual; opposed to negative. Positive good. Bacon. [1913 Webster] 2. Derived from an object… …
34see-saw — n., v., adj., & adv. n. 1 a a device consisting of a long plank balanced on a central support for children to sit on at each end and move up and down by pushing the ground with their feet. b a game played on this. 2 an up and down or to and fro… …
35crankarm — [1] A part on a bicycle, where one end is attached to the bottom bracket axle and the other holds a pedal, whose forward rotation provides the leverage needed to power the bicycle. [2] An arm set at right angles to a shaft or axle, used for… …
36Norman Toponymy — refers to all place names in Normandy. Some belong to the common heritage of the Langue d oïl extension zone in northern France and Belgium; this is called Pre Normanic. Others contains Old Norse and Old English male names and toponymic… …
37reciprocating engine — noun Date: 1822 an engine in which the to and fro motion of one or more pistons is transformed into the rotary motion of a crankshaft …
38Limbo (dance) — Limbo is a dance that originated on the island of Trinidad, though Hawaii is often mistakenly associated with limbo. The dancer moves to a Caribbean rhythm, then leans backward and dances under a horizontal stick without touching it. Upon… …
39crank — [1] An arm set at right angles to a shaft or axle, used for converting reciprocal (to and fro) motion into circular motion. Also see cottered crank cotterless crank flat crank hand crank [2] The action of trying to start a vehicle engine or an… …
40saw — saw1 [sô] n. [ME sawe < OE sagu, akin to Ger säge, Du zaag < IE base * sek , to cut, > L secare, to cut, OE seax, knife] 1. a) a cutting tool, of various shapes and sizes and worked by hand or machinery, consisting essentially of a thin… …
