(1):

(a.) Tending, or causing, to approach the center.

(2):

(a.) Expanding first at the base of the inflorescence, and proceeding in order towards the summit.

(3):

(a.) Having the radicle turned toward the axis of the fruit, as some embryos.

(4):

(a.) Progressing by changes from the exterior of a thing toward its center; as, the centripetal calcification of a bone.