dialecticism

[ dahy-uh-lek-tuh-siz-uh m ]
/ ˌdaɪ əˈlɛk təˌsɪz əm /

noun

dialectal speech or influence.
a dialectal word or expression.

Origin of dialecticism

First recorded in 1885–90; dialectic + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019