obsidian
[ uhb-sid-ee-uhn ]
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Part of Speech noun
Origin + Etymology
Mid 17th century; Latin from Latin obsidianus, error for obsianus, from Obsius, the name (in Pliny) of the discoverer of a similar stone
Synonyms
  • dark
  • ebony
  • raven
Antonyms
  • white
Definition
a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture
Example
The museum had a display full of ancient weapons made from obsidian.
Usage Over Time

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