a curve traced
by an end
point of a segment of constant length located
on a straight
line that rotates
about a fixed point, while the other end point moves along a straight line that does
through the fixed point
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'conchoid'
< Gr konchoeidēs (grammē)
, conchoid (line), lit., mussel-like: see conch