单词	cycloid
释义	cy·cloid I. \ˈsīˌklȯid\ noun (-s) Etymology: French cycloïde, from Greek kykloeidēs, adjective, circular, from kykl- cycl- + -oeidēs -oid 1. : a curve traced by any point on the circumference of a circle that rolls without sliding on a straight line 2. : cyclothyme II. adjective Etymology: Greek kykloeidēs 1. : arranged or progressing in circles : circular  < cycloid protoplasmic movements > 2. : having concentric lines of growth and a smooth margin and surface  < cycloid scales are characteristic of soft-rayed fishes > : consisting of scales of this type  < cycloid scalation > : having scales of this type  < cycloid fishes > — compare ctenoid 3. : cyclothymic
随便看	rumpus room rumpy rumrunner rum-running rums rumshop rum sucker rum tum ditty rum tum tiddy run run runabout run across run after foldboat foldboater foldboating fold breccia foldcourse folded folded dipole folden folder folder folderol

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