obsidian[əb sid′ē ən]
Origin: 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
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Origin: Latin obsidiānus, misreading of obsiānus (lapis), Obsian (stone), obsidian, after Obsius, a Roman who supposedly discovered it or a similar mineral.
obsidian - Science Definition
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