cycloid /ˈsaɪklɔɪd/adjective 3noun 2forms 1 adjective3 •Resembling a circle; cycloidal. •Thin and rounded, with smooth edges. •characterized by alternating high and low moods. noun2 •The locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line.In the first Course there was a Shoulder of Mutton, cut into an Aequilateral Triangle, a Piece of Beef into a Rhomboides, and a Pudding into a Cycloid. — 1726 •A fish having cycloid scales. formscycloids
