1) Having tentacles or rays 
• (a.) Pertaining to the part of a radiate animal which contains the mouth.
Ac'ti·nal adjective [ Greek ..., ..., ray.] (Zoology) Pertaining to the part of a radiate animal which contains the mouth. Latin Agassiz. 
[adj] - (of radiate organisms) located on the surface or end on which the mouth is situated
actinal The region from which the rays or tentacles grow on a radiate animal.
adjective (of radiate organisms) located on the surface or end on which the mouth is situated