natural glass 1
noundomain: substance
Princeton WordNet [ver.3.1]
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EnglishDefinition
magma of any composition that cooled very rapidly
Hypernym
glass 1
noun
a brittle transparent solid with irregular atomic structure
EnglishHyponym
quartz glass 1
noun
colorless glass made of almost pure silica
tektite 1
noun
thought to derive from meteorites
