English

subdecimal

From sub- + decimal.

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

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Proto-Indo-European *déḱm̥ ‘ten’

Proto-Italic *dekem

Latin decem ‘ten’

Latin decimus ‘tenth’

Medieval Latin decimalis

Today it means

adj That results from a division by ten or by a multiple of ten)

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

Etymograph / subdecimal