langley

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun unit of solar radiation
  2. noun United States astronomer and aviation pioneer who invented the bolometer and contributed to the design of early aircraft (1834-1906)

Etymology

Named in 1947 after Samuel Pierpont Langley (1834-1906).

In classic literature

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