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Noun
A
pyroxene
mineral
,
a
sodium
aluminium
silicate
with
the
chemical formula
Na
(
Al
,
Fe
<
sup
>
3
+sup
>)
Si
<
sub
>
2
sub
>
O
<
sub
>
6
sub
>,
found
in
metamorphic
rocks
.
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Rejected by Y-Combinator. Definitions by Wiktionary.

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