cylindrus (noun M) = κύλινδρος:
* A cylinder.
* Prop., Cic. N. D. 1, 10, 24; id. Fat. 19, 41.
* Meton.
* A cylindrical stone for levelling the ground, a roller, etc., Cato, R. R. 129; Verg. G. 1, 178; Plin. 19, 8, 46, § 158; Vitr. 10, 6 al.
* A precious stone ground off in the form of a cylinder, Plin. 37, 5, 20, § 78; 37, 8, 34, § 113; Juv. 2, 61 al.

s. TLL