Dictionary:

actinomorphic

  (ăk'tə-nō-môr'fĭk) also actinomorphous (-fəs)

Capable of being divided into equal halves along any diameter, as the flowers of the rose or tulip; radially symmetrical.

A term used to describe a flower that is radially symmetrical. Any cut through the center divides it into two equal parts. Two examples are crocus and lily. See also zygomorphic; regular flower.

The adjective has one meaning:

Meaning #1: (biology) capable of division into symmetrical halves by any longitudinal plane passing through the axis
  Synonym: actinomorphous
  Antonym: zygomorphic (meaning #1)