CYLINDROID

Etymology

Noun

cylindroid (plural cylindroids)

(geometry) A cylinder with elliptical cross-section.

(geometry) A certain three-dimensional surface described by a moving straight line, used to illustrate the motions of a rigid body and the forces that act upon it.

(medicine) A ribbon-like mucous cast frequently found in the urine in cases of mild irritation of the kidney.

Source: Wiktionary

Cyl"in*droid (sl"n-droid), n. Etym: [Gr. -oid: cf. F. cylindro.]

1. A solid body resembling a right cylinder, but having the bases or ends elliptical.

2. (Geom.)

Definition: A certain surface of the third degree, described by a moving straight line; -- used to illustrate the motions of a rigid body and also the forces acting on the body.

Source: Webster’s Unabridged Dictionary 1913 Edition