Bible Dictionaries
Conchoid

Webster's Dictionary

(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.

Bibliography Information
Webster, Noah. Entry for 'Conchoid'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​c/conchoid.html. 1828.