epicycloid noun.
[ɛpɪ'sʌɪklɔɪd] L18.[from EPICYCLE + -OID.]A curve traced by a point on the circumference of a circle as it rolls round the outside of a fixed circle (or, formerly, round the inside: cf.
HYPOCYCLOID).
■ epicy'cloidal adjective E19. [TahlilGaran] English Dictionary ▲