ses

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
  2. noun the compass point midway between south and east; at 135 degrees
  3. noun 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites

Synonyms

selenium, Se, atomic number 34

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