a. [f. ACTINO- + -ειδ-ής -form.] Having the form of rays, radiated; said of a division of Zoophytes or Polypes, having the internal cavity divided by radiated partitions, as in the coral zoophytes.
1848. Dana, Zoophytes, iv. § 37, 43. Other actinoid polyps.
1860. Actinolog. Brit., Introd. 22. The cnidæ, in the Actinoid Zoophytes, are not confined to one organ or set of organs.
