The meaning of Conchoids and additional information.

Conchoid(n.) A curve, of the fourth degree, first made use of by the Greek geometer, Nicomedes, who invented it for the purpose of trisecting an angle and duplicating the cube.

Conchoidal(a.) Having elevations or depressions in form like one half of a bivalve shell; -- applied principally to a surface produced by fracture.