WordNet sense 1 (tending to unify):

unifying

WordNet sense 2 (tending to draw to a central point):

centralising, centralizing

WordNet sense 3 (of a nerve fiber or impulse originating outside and passing toward the central nervous system):

receptive, sensory

WordNet sense 4 (of nerves and nerve impulses; conveying sensory information from the sense organs to the CNS):

afferent