Word:

Trochoid

Tro´choid
n.1.(Geom.) The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are all trochoids.
a.1.(Anat.) Admitting of rotation on an axis; - sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column.
2.(Zool.) Top-shaped; having a flat base and conical spire; - said of certain shells.
3.(Zool.) Of or pertaining to the genus Trochus or family Trochidæ.
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Trochili
Trochilic
Trochilics
Trochilidae
Trochilidist
Trochilos
Trochilus
Troching
Trochiscus
Trochisk
Trochite
Trochlea
Trochlear
trochlear nerve
trochlearis
Trochleary
-- Trochoid --
Trochoidal
Trochometer
Trochosphere
Trochus
Troco
Trod
Trodden
Trode
troff
Trofim Denisovich Lysenko
Trogium
Trogium pulsatorium
Troglodyte
troglodyte mode
Troglodytes
Troglodytes aedon
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