| 单词 | rotation |
| 释义 | rotation —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 succession, as of officials. 4. Agric. See crop rotation. 5. Math. a. an operation that rotates a geometric figure about a fixed point. b. curl (def. 17). 6. Pool. a game in which the balls are played in order by number. 7. Baseball. See pitching rotation. [1545-55; < L rotation- (s. of rotatio) a rotation, rolling, equiv. to rotat(us) (see ROTATE1) + -ion- -ION] |
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