acidulent

adjective

acid·​u·​lent ə-ˈsi-jə-lənt 

: acidulous

Word History

Etymology

borrowed from French acidulant, present participle of aciduler "to make acidic" (spelling in English assimilated to the suffix -ulent), back-formation from acidulé "treated with acid," borrowed from New Latin acidulātus — more at acidulate

First Known Use

1800, in the meaning defined above