Moment of rotation. See Moment of inertia, under Moment. -- Rotation in
office, the practice of changing public officers at frequent intervals
by discharges and substitutions. -- Rotation of crops, the practices of
cultivating an orderly succession of different crops on the same land.
Ro*ta"tion (?), a. Pertaining to, or resulting from, rotation; of the
nature of, or characterized by, rotation; as, rotational velocity.
Ro"ta*tive (?), a. [Cf. F. rotatif.] turning, as a wheel; rotary;
rotational.
This high rotative velocity of the sun must cause an equatorial
rise of the solar atmosphere.
Siemens.
Rotative engine, a steam engine in which the reciprocating motion of
the piston is transformed into a continuous rotary motion, as by means
of a connecting rod, a working beam and crank, or an oscillating
cylinder.
Ro*ta"tor (?), n. [L.] 1. (Anat.) that which gives a rotary or rolling
motion, as a muscle which partially rotates or turns some part on its
axis.