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red fuming nitric acid

Noun CEFR C2

Definitions

A storable oxidizer used as a rocket propellant, consisting of 84% nitric acid, 13% dinitrogen tetroxide, and 1–2% water.

uncountable

CEFR level

C2
Mastery
This word is part of the CEFR C2 vocabulary — mastery level.
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