English

subnucleus

From sub- + nucleus.

Proto-Indo-European *upó ‘up; from below’

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Proto-Italic *knuks ‘nut’

Latin nux ‘nut’

Latin nucleus ‘kernel, core’

Today it means

noun A secondary nucleus (of neurons)

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

Etymograph / subnucleus