D defs.my
Entry 1 sense Webster, 1913

Cycloidal

/(-al)/ · Cy·cloid·al · IPA
01 a. Pertaining to, or resembling, a cycloid; as, the cycloidal space is the space contained between a cycloid and its base.
  1. 1.
    Pertaining to, or resembling, a cycloid; as, the cycloidal space is the space contained between a cycloid and its base.
Phrases & compounds
Cycloidal engine — See Geometric lathe.