iridium

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium

From international scientific vocabulary, from the New Latin.

Cold Fusion, the brief prayer for immediate, cheap energy inde- pendence made headlines, but Scott Mason dug deep and found that some of the advocates of Cold Fusion had vested interests in palladium and iridium mining concerns. — Terminal Compromise, Winn Schwartau

Ir, atomic number 77

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