n.
Pronunciation: ' s ī - ˌ klo ̇ id
Function: noun
Etymology: French cycloïde, from Greek kykloeid ē s circular, from kyklos
Date: 1661
: a curve that is generated by a point on the circumference of a circle as it rolls along a straight line
– cy · cloi · dal \ s ī - ' klo ̇ i-d ə l \ adjective
cycloid