Source : Webster's Revised Unabridged Dictionary (1913)

Gorgonian \Gor*go"ni*an\, n. (Zo["o]l.)
   One of the Gorgoniacea.

Gorgonian \Gor*go"ni*an\, a. [L. Gorgoneus.]
   1. Pertaining to, or resembling, a Gorgon; terrifying into
      stone; terrific.

            The rest his look Bound with Gorgonian rigor not to
            move.                                 --Milton.

   2. (Zo["o]l.) Pertaining to the Gorgoniacea; as, gorgonian
      coral.

Source : WordNet®

gorgonian
     n : corals having a horny of calcareous branching skeleton [syn:
          {gorgonian coral}]