Defn: Any fossil foraminifer of the genus Rotalia, abundant in the chalk formation. See Illust. under Rhizopod.
ROTARY
Ro"ta*ry, a. Etym: [L. rota a wheel. See Roll, v., and cf. barouche,
Rodomontade, Roué, Round, a., Rowel.]
Defn: Turning, as a wheel on its axis; pertaining to, or resembling, the motion of a wheel on its axis; rotatory; as, rotary motion. Rotary engine, steam engine in which the continuous rotation of the shaft is produced by the direct action of the steam upon rotating devices which serve as pistons, instead of being derived from a reciprocating motion, as in the ordinary engine; a steam turbine; — called also rotatory engine. — Rotary pump, a pump in which the fluid is impelled by rotating devices which take the place of reciprocating buckets or pistons. — Rotary shears, shears, as for cloth, metal, etc., in which revolving sharp-edged or sharp-cornered wheels do the cutting. — Rotary valve, a valve acting by continuous or partial rotation, as in the four-way cock.
ROTASCOPE
Ro"ta*scope, n. Etym: [L. rota a wheel + -scope.]
Defn: Same as Gyroscope, 1.
ROTATE Ro"tate, a. Etym: [L. rotatus, p.p. of rotare to turn round like a wheel, fr. rota wheel. See Rotary, and cf. Roue.]
Defn: Having the parts spreading out like a wheel; wheel-shaped; as, a rotate spicule or scale; a rotate corolla, i.e., a monopetalous corolla with a flattish border, and no tube or a very short one.
ROTATE
Ro"tate, v. i. [imp. & p. p. Rotated; p. pr. & vb. n. Rotating.]
1. To turn, as a wheel, round an axis; to revolve.
2. To perform any act, function, or operation in turn, to hold office in turn; as, to rotate in office.