-i Morpheme -i Type suffix Denotation Latin plural of -us, Latin genitive of -on Etymology Latin -i Evidence alumni, cacti, coli, foci, frangipani, fungi, -ii nuclei, radii, spermaceti, stimuli, syllabi, termini See Also -us Homographs I, i-, i-, -i-, -i, -i, -i Share on FacebookTweetSave