octactinal, a. Zool.
(ɒktækˈtaɪnəl, -ˈæktɪnəl)
[f. Gr. ὀκτώ or ὀκτα- eight + ἀκτίς, ἄκτῑν- ray + -al1: cf. actinal.]
Having eight rays; spec. belonging to the Octactiniæ or Octocoralla, sub-class of Anthozoa (see octo-). So octacˈtinian a. and n.
| 1888 Rolleston & Jackson Anim. Life 769 Jickeli suggests..that the Graptolites are possibly Octactinians. 1891 Cent. Dict., Octactinal. |