κάρυον

Etymology
From. Cognates include 🇨🇬, 🇨🇬, 🇨🇬 (all three meaning 'brain') and 🇨🇬, 🇨🇬 and 🇨🇬 (all three meaning 'head').

See as well, and.

Noun

 * 1) nut hard-shelled seed