English

endonucleus

From endo- + nucleus.

Proto-Indo-European *h₁n̥dóm ‘inside’

Proto-Hellenic *éndon

Ancient Greek ἔνδον ‘inner’

English endo-

Proto-Italic *knuks ‘nut’

Latin nux ‘nut’

Latin nucleus ‘kernel, core’

Today it means

noun The compact mass of nuclear material in the lens of the eye

Language periods are conventional ranges, not dates for this word.

Etymograph / endonucleus