A constituent in Latin grammar; a noun and its modifier can function as a sentence modifier WordNet 3.0 & Open English WordNet

A construction in Latin and Oscan and Umbrian in which an independent phrase with a noun in the ablative case has a participle, adjective, or noun, expressed or implied, which agrees with it in gender, number and case – both words forming a clause grammatically unconnected with the rest of the sentence. Wiktionary

Linguistic construction in Latin. Wiktionary (translation)