rotunditas
From LSJ
Ὁ κόσμος σκηνή, ὁ βίος πάροδος· ἦλθες, εἶδες, ἀπῆλθες → The world is a stage, life is your entrance: you came, you saw, you departed (Democritus fr. 115 D-K)
Latin > English (Lewis & Short)
rŏtundĭtas: ātis,f. rotundus,
I a round shape, roundness, rotundity (post-Aug.).
I Lit.: gemma rotunditatis absolutae, Plin. 37, 11, 73, § 190; so id. 18, 13, 34, § 130; 16, 23, 35, § 86; 19, 5, 25, § 76 al.—
II 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.