adj. & n. Gram.
adj. (of a word, form, etc.) denoting part of a collective group or quantity.
n. a partitive word (e.g. some, any) or form. partitive genitive a genitive used to indicate a whole divided into or regarded in parts, expressed in English by of as in most of us. partitively adv.
[ F partitif -ive or med.L partitivus (as PARTITE) ]