English

subnuclear

From sub- + nuclear.

A compound of sub- + nuclear

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 ‘small nut; kernel’

Today it means

adj Smaller than or occurring in an atomic nucleus.

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

Etymograph / subnuclear