obsidian
English Thesaurus
1. acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces (noun.substance)
| hypernym | : | volcanic glass, |
| definition | : | a kind of natural glass produced when molten lava cools very rapidly (noun.substance) |
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Tesaurus Bahasa Indonesia
| sinonim | : | batu gelas, |
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