noun. ['əbˈsɪdiːən'] acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces.
Words that Rhyme with Obsidian
Example sentences of the word obsidian
Arrowheads were made from flint or obsidian but could also be made from bone, horn and copper.
2. Noun, singular or mass
Unlike other rocks, obsidian is not considered a mineral because of its noncrystalline, glass-like structure.