encephalon

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord

Learned borrowing from Ancient Greek ἐγκέφαλος (enképhalos, “within the head”), from ἐν (en, “in”) + κεφαλή (kephalḗ, “head”).

In the mollusc, on the contrary, the retina is derived from the ectoderm directly, and not indirectly by means of the embryonic encephalon. — Creative Evolution, Bergson, Henri

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