The Collaborative International Dictionary of English v.0.48:

Alcyonoid \Al"cy*o*noid\ ([a^]l"s[i^]*[-o]*noid), a. [Gr.
   'alkyo`nion + -oid.] (Zool.)
   Like or pertaining to the Alcyonaria. -- n. A zo["o]phyte
   of the order Alcyonaria.
   [1913 Webster]