A Latinism (also called Latinity) is an idiom, structure, or word in a language other than Latin derived from, or suggestive of, the Latin language. For Latinistic words in English, see Latin influence in English.
It can also be used to mean a word borrowed into another language from Latin, especially one deemed over-pretentious. See Inkhorn term for this meaning.
References
Latinism Wikipedia(Text) CC BY-SA