Dictionary Home »
Webster's New World College Dictionary » obsidian
obsidian
obsidian definition
ob·sid·ian (əb sid′ē ən)
noun
a hard, usually dark-colored or black volcanic glass with conchoidal fracture, often used as a gem
Etymology: ModL obsidianus < L Obsidianus (lapis), a faulty reading in Pliny (altered by assoc. with L obsidium, a siege < obsidere: see obsess) for Obsianus (lapis), stone of Obsius, finder of a similar stone in Ethiopia
Browse dictionary definitions near obsidian
Also Mentioned In