“n. A school or college course, especially one in a specialized field of study, that is designed to give students supervised practical application of previously studied theory: advanced practicums in teaching reading.”

RE:
Is there a plural to the word 'practicum'?
Someone told me it was practica, but that comes up as not a word in MS Word. So does practicums.

like data, which is plural, the singular of which is a single datum.

don’t worry about ms word, it’s kinda dumb.

you could probably get away with practicums. after all, i never hear anyone saying stadia, just stadiums. that is an acceptable americanism. but technically, it is indeed practica.