- having tentacles or rays.
- pertaining to the oral area from which the arms or tentacles radiate.
Origin of actinal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for actinal
The larval mouth is transported into the centre of the actinal disc.
It is situated on the actinal or ventral surface of the future starfish, and is related to the left peritoneal vesicle.
The plane of the actinal surface at first meets that of the abactinal at an acute or nearly right angle.
- of or denoting the oral part of a radiate animal, such as a jellyfish, sea anemone, or sponge, from which the rays, tentacles, or arms grow
- possessing rays or tentacles, as a jellyfish
C19: see actino-, -al 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012