SINCE 1828
borosilicate
noun
bo·ro·sil·i·cate
| \ ˌbȯr-ō-ˈsi-lə-ˌkāt
, -ˈsi-li-kət\
, -ˈsi-li-kət\
Definition of borosilicate
1
: a silicate containing boron in the anion and occurring naturally
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Merriam-Webster unabridged
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