cyst

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a closed sac that develops abnormally in some body structure
  2. noun a small anatomically normal sac or bladderlike structure (especially one containing fluid)

Etymology

From Late Latin cystis, from Ancient Greek κύστις (kústis, “anatomical sac”).

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