at

Reading level: easy

Estimated CEFR level: A1 — Beginner

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
  2. noun 100 at equal 1 kip in Laos

Etymology

From Middle English at, from Old English æt (“at, near, by, toward”), from Proto-West Germanic *at, from Proto-Germanic *at (“at, near, to”), from Proto-Indo-European *h₂éd (“near, at”). Cognate with Scots at (“at”), North Frisian äät, äit, et, it (“at”), Danish at (“to”), Swedish åt (“for, toward”), Norwegian åt (“to”), Faroese at (“at, to, toward”), Icelandic að (“to, towards”), Gothic 𐌰𐍄 (at, “at”), Latin ad (“to, near”).

In classic literature

Synonyms

astatine, atomic number 85

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