sulcus

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain

Borrowed from Latin sulcus (“a furrow made by a plow”). Doublet of sullow ("plough").

Ejicit enim sulci recta regione viaque Vomerem, atque locis avertit seminis ictum. — Essays of Michel de Montaigne — Complete, Michel de Montaigne
The gyri and sulci over the left hemisphere are of essentially normal size and distribution. — Report of the President's Commission on the Assassination of President John F. Kennedy, United States. Warren Commission

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