onyx

Definition

A banded variety of chalcedony, a cryptocrystalline form of quartz.

Etymology

From Middle English onix (c. 1300), earlier oniche (c. 1250), from Old French oniche or onix, from Latin onyx, from Ancient Greek ὄνυξ (ónux, “onyx”). Doublet of unguis.

Example Sentences

• "People talk about using marble in the bathrooms. Marble wasn't good enough for use—we have onyx!"
• "Near-synonyms: ebony, raven"