**epicycloid** — [ep΄ə sī′kloid΄] n. [ EPICYCL(E) + OID] Geom. the curve traced by a point on the circumference of an epicycle that rolls around the outside of a fixed circle: cf. HYPOCYCLOID epicycloidal [ep΄ə sī′kloid′ l] adj … English World dictionary

**Epicycloid** — In geometry, an epicycloid is a plane curve produced by tracing the path of a chosen point of a circle mdash; called epicycle mdash; which rolls without slipping around a fixed circle. It is a particular kind of roulette.If the smaller circle has … Wikipedia

**epicycloid** — noun Date: circa 1755 a curve traced by a point on a circle that rolls on the outside of a fixed circle • epicycloidal adjective … New Collegiate Dictionary

**epicycloid** — epicycloidal, adj. /ep euh suy kloyd/, n. Geom. a curve generated by the motion of a point on the circumference of a circle that rolls externally, without slipping, on a fixed circle. Equation: x = (a + b) cos(t) b cos [(a + b)t/b] and y = (a +… … Universalium

**epicycloid** — noun The locus of a point on the circumference of a circle that rolls without slipping on the circumference of another circle … Wiktionary

**epicycloid** — epÂ·iÂ·cyÂ·cloid || â€šepÉª saÉªklÉ”Éªd n. curve that is described by a point on the perimeter of a circle as the circle moves on the outside of the circumference of another circle (Mathematics) … English contemporary dictionary

**epicycloid** — [ˌɛpɪ sʌɪklɔɪd] noun Mathematics a curve traced by a point on the circumference of a circle rolling on the exterior of another circle. Derivatives epicycloidal adjective … English new terms dictionary

**epicycloid** — ep·i·cy·cloid … English syllables

**epicycloid** — ep•i•cy•cloid [[t]ˌɛp əˈsaɪ klɔɪd[/t]] n. math. a curve generated by the motion of a point on the circumference of a circle that rolls externally, without slipping, on a fixed circle • Etymology: 1780–90 ep i•cy•cloi′dal, adj … From formal English to slang

**epicycloid** — /ɛpiˈsaɪklɔɪd/ (say epee suykloyd) noun Geometry a curve generated by the motion of a point on the circumference of a circle which revolves, usually externally, on the circumference of a larger circle. –epicycloidal /ˌɛpisaɪˈklɔɪdl/ (say .epeesuy … Australian English dictionary