cycloid

== English == === Etymology === From cyclo- +‎ -oid. === Pronunciation === IPA(key): /ˈsaɪklɔɪd/ === Noun === cycloid (plural cycloids) (geometry) The locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line. (zoology) A fish having cycloid scales. ==== Derived terms ==== ==== Translations ==== === Adjective === cycloid (not comparable) Resembling a circle; cycloidal. (zoology, of fish scales) Thin and rounded, with smooth edges. (psychoanalysis) characterized by alternating high and low moods. ==== Derived terms ==== cycloidal cycloidal arch cycloidal engine ==== Translations ==== === Related terms === epicycloid hypocycloid === See also === Spirograph™