rotation about a point
11point group — Crystall. a class of crystals determined by a combination of their symmetry elements, all crystals left unchanged by a given set of symmetry elements being placed in the same class. Also called symmetry class. [1900 05] * * * ▪ crystallography… …
12Rotation in office — Rotation in office, or term limits, dates back to the American Revolution, and prior to that to the democracies and republics of antiquity. The council of 500 in ancient Athens rotated its entire membership annually, as did the ephorate in… …
13Rotation around a fixed axis — Rotational motion can occur around more than one axis at once, and can involve phenomena such as wobbling and precession. Rotation around a fixed axis is a special case of rotational motion, which does not involve those phenomena. The kinematics… …
14Rotation number — This article is about the rotation number, which is sometimes called the map winding number or simply winding number. There is another meaning for winding number, which appears in complex analysis. In mathematics, the rotation number is an… …
15about — prep. & adv. prep. 1 a on the subject of; in connection with (a book about birds; what are you talking about?; argued about money). b relating to (something funny about this). c in relation to (symmetry about a plane). d so as to affect (can do… …
16rotation — noun 1 (U) the action of turning around a fixed point (+ about/around/on): the rotation of the Earth on its axis 2 (C) one complete turn around a fixed point: The blades spin at 100 rotations per minute. 3 in rotation a) if a group of people do… …
17rotation — rotational, adj. /roh tay sheuhn/, n. 1. the act of rotating; a turning around as on an axis. 2. Astron. a. the movement or path of the earth or a heavenly body turning on its axis. b. one complete turn of such a body. 3. regularly recurring… …
18about — /euh bowt /, prep. 1. of; concerning; in regard to: instructions about the work; a book about the Civil War. 2. connected or associated with: There was an air of mystery about him. 3. near; close to: a man about my height; about six o clock. 4.… …
19about — /əˈbaʊt / (say uh bowt) preposition 1. of; concerning; in regard to: to talk about secrets. 2. connected with: instructions about the work. 3. somewhere near or in: she is about the house. 4. near; close to: about my height. 5. on every side of;… …
20rotation — I (New American Roget s College Thesaurus) Motion around a center axis Nouns 1. rotation, revolution, gyration, turning, circulation, roll; circum rotation, circumvolution, circumgyration, turbination, convolution. 2. whir, whirl, turn, pirouette …
