Onycha
Pronunciation : On"y*cha
Part of Speech : n.
Etymology : [NL., from L. onyx, -ychis, onyx, also, a kind of mussel, Gr. Onyx.]
Definition : 1. An ingredient of the Mosaic incense, probably the operculum of some kind of strombus. Ex. xxx. 34.
2. The precious stone called onyx. [R.]
Source : Webster's Unabridged Dictionary, 1913