Lewis Short
rŏtundĭtas (noun F) : rotundus
* A roundshape, roundness, rotundity (post-Aug.).
* Lit.: gemma rotunditatis absolutae,Plin. 37, 11, 73, § 190; so id. 18, 13, 34, § 130; 16, 23, 35, § 86; 19, 5, 25, § 76 al.
* Trop.: verborum,a roundness, smoothness,Macr. S. 7, 5: Symmachi,Sid. Ep. 1, 1.—Concr., a circular space: rotunditas dimidii cubiti,Vulg. 3 Reg. 7, 35.
Charlton T. Lewis, Charles Short, A Latin Dictionary