TROCHOID


Meaning of TROCHOID in English

[ 'trəʊkɔɪd ]

■ adjective

1》 Anatomy denoting a joint in which one element rotates on its own axis (e.g. the atlas vertebra).

2》 Geometry denoting a curve traced by a point on a radius of a circle rotating along a straight line or another circle.

3》 Zoology (of a mollusc shell) conical with a flat base.

■ noun

1》 a ~ curve.

2》 a ~ joint.

Derivatives

~al adjective

Origin

C18: from Gk trokhoeidēs 'wheel-like', from trokhos 'wheel'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.