halon

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms; very stable; used in fire extinguishers although it is thought to release bromine that depletes the ozone layer

Blend of halogen + carbon.

In case of fire, heat sensors trigger the release of halon gas and suck all of the oxygen from the room in seconds. — Terminal Compromise, Winn Schwartau

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