partitive

word (such a `some' or `less') that is used to indicate a part as distinct from a whole

(Romance languages) relating to or denoting a part of a whole or a quantity that is less than the whole; "a partitive construction"

indicating or characterized by or serving to create partition or division into parts; "partitive tendencies in education"

serving to separate or divide into parts; "partitive tendencies in education"; "the uniting influence was stronger than the separative"