O / ŏnyx
noun greek

ŏnyx

gen. ŏnyўchis · gender masculine · decl. 3rd
and , = ὄνυξ (a fingernail; hence, from its color).
a kind of yellowish marble; onyx
Fem., a kind of yellowish marble, onyx, of which vessels of many kinds were made; it was also used for mlaying floors, Plin. 36, 7, 12, § 59: totāque effusus in aulā Calcabatur onyx, Luc. 10, 116; calcatusque tuo sub pede lucet onyx, Mart. 12, 50, 4.—
a vessel of onyx; an onyx-box
Masc., a vessel of onyx, an onyx-box: nardi parvus onyx, Hor. C. 4, 12, 17; murrheus, an ointment-box, Prop. 3, 8 (4, 9), 22; cf.: Syrio munere plenus onyx, id. 2, 10 (3, 5), 14.— In this signif. also as fem.: unguentum fuerat, quod onyx modo parva gerebat, Mart. 7, 94, 1.—
A yellowish precious stone; an onyx
A yellowish precious stone, an onyx, Plin. 37, 6, 24, § 90
The female of a mussel of the scallop species
The female of a mussel of the scallop species, Plin. 32, 9, 32, § 103.