Adjective cycloid has 1 sense
  1. cycloid, cycloidal - resembling a circle
    Antonyms: angular, angulate (indirect, via rounded)
,Noun cycloid has 1 sense
  1. cycloid - a line generated by a point on a circle rolling along a straight line
    --1 is a kind of
    roulette, line roulette
    --1 has particulars: curate cycloid; prolate cycloid
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