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单词 cycloid
释义

WordReference Random House Unabridged Dictionary of American English © 2024
cy•cloid  (sī′kloid),USA pronunciation adj. 
  1. resembling a circle;
    circular.
  2. Fish(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. Psychiatryof or noting a personality type characterized by wide fluctuation in mood within the normal range.

n. 
  1. Fisha cycloid fish.
  2. Mathematics[Geom.]a curve generated by a point on the circumference of a circle that rolls, without slipping, on a straight line.
  • Greek kykloeidé̄s like a circle. See cycl-, -oid
  • 1655–65
cy•cloi′dal, adj. 
cy•cloi′dal•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::
cycloid /ˈsaɪklɔɪd/ adj
  1. resembling a circle
 n
  1. the curve described by a point on the circumference of a circle as the circle rolls along a straight line
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更新时间：2025/2/23 9:55:24