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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
vitreous silica
1.
vitreous silica
(substance)
colorless glass made of almost pure silica
Synonyms
crystal
,
lechatelierite
,
quartz
,
quartz glass
Broader (hypernym)
natural glass
Substance holonym
silica
,
silicon dioxide
,
silicon oxide
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