Lewis Short
(adjective) = ὀνύχινος: ŏnychĭnus, a, um, , = .
* Of the color of the finger-nail, nail-colored: pira,Plin. 15, 15, 16, § 55: pruna,Col. 12, 10.
* Of the marble called onyx: lapis,Vulg. Gen. 2, 12.—As subst.: onychinus,the onyx,Vulg. Exod. 39, 13.—Transf., resembling the onyx (poet.) of the coating of ice on rivers: tegimen onychinum, Laev ap. Gell. 19, 7 fin.—Subst.: ŏnychĭna (sc. vasa), n. plur., vessels of onyx, Lampr. Heliog. 32.
Charlton T. Lewis, Charles Short, A Latin Dictionary