Noun

(en noun)

(chiefly, uncountable) The act of turning around a centre or an axis.

*{{quote-magazine, date=2013-03

, author=Frank Fish, George Lauder , title=Not Just Going with the Flow , volume=101, issue=2, page=114 , magazine= citation , passage=An extreme version of vorticity is a vortex . The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.}}

The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere.

A single complete cycle around a centre or an axis.

Earth's moon completes a rotation every twenty-seven days or so.

A regular variation in a sequence.

crop rotation

The medical resident finished a two-week rotation in pediatrics and began one in orthopaedics.

(mathematics) An operation that a continuous isometry deformation that fixes at least one point can result in.

The function mapping (''x'',''y'') to (''&

x2212;y'',''x'') is a rotation .

(baseball) The set of (soplink) of a team.

(aviation) The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll.

Noun

(en noun)

The act of librating.

(astronomy) The apparent wobble or variation in the visible side of the Moon that permanently faces the Earth, allowing observers on Earth to see, over a period of time, slightly more than half of the lunar surface.

(by extension) A similar rotational or orbital characteristic of some other celestial body.