Dictionary > English Dictionary > Definition, synonym and antonym of obsidian
Meaning of obsidian by Wiktionary Dictionary




    • ( UK ) IPA: /ˌɒbˈsɪd.i.ən/
    • ( US ) IPA: /ˌɑbˈsɪdiən/


    obsidian ( usually uncountable; plural: obsidians )

    1. ( 鉱物学 ) a type of black glass produced by volcanos


    obsidian ( comparative more obsidian, superlative most obsidian )

    1. ( poetic ) black

Explanation of obsidian by Wordnet Dictionary


    1. acid or granitic glass formed by the rapid cooling of lava without crystallization

    Definition of obsidian by GCIDE Dictionary


    1. obsidian n. [L. Obsidianus lapis, so named, according to Pliny, after one Obsidius, who discovered it in Ethiopia: cf. F. obsidiane, obsidienne. The later editions of Pliny read Obsianus lapis, and Obsius, instead of Obsidianus lapis, and Obsidius.] ( Min. ) A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

      ☞ In a thin section it often exhibits a fluidal structure, marked by the arrangement of microlites in the lines of the flow of the molten mass.