rachis

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun axis of a compound leaf or compound inflorescence
  2. noun the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

Etymology

From New Latin rachis, from Ancient Greek ῥάχις (rhákhis, “spine, ridge”).

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