| 单词 | cycloid |
| 释义 | cycloid —cycloidal, adj. —cycloidally, adv. /suy"kloyd/, adj. 1. resembling a circle; circular. 2. (of the scale of a fish) smooth-edged, more or less circular in form, and having concentric striations. 3. (of a fish) having such scales. 4. Psychiatry. of or noting a personality type characterized by wide fluctuation in mood within the normal range. n. 5. a cycloid fish. 6. Geom. a curve generated by a point on the circumference of a circle that rolls, without slipping, on a straight line. [1655-65; < Gk kykloeidés like a circle. See CYCL-, -OID] |
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