| 单词 | rotational symmetry |
| 释义 | > as lemmasrotational symmetry rotational symmetry n. symmetry with respect to rotation about a point (for a plane figure) or about an axis (for a three-dimensional entity). ΚΠ 1907 Nature 21 Feb. 406/1 Classes [of crystals] with the same rotational symmetry round the axis. 1940 Amer. Jrnl. Psychol. 53 59 An example of..a change where rotational symmetry about a point is produced. 2005 M. Livio Equation that couldn't be Solved i. 10 Starfish have fivefold rotational symmetry; they can be rotated by 72, 144, 216, 288, and 360 degrees with no discernable difference. < as lemmas |
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