The Collaborative International Dictionary of English v.0.48:

Glyconic \Gly*con"ic\, a. [Gr. ? a kind of verse, so called from
   its inventor, Glycon.] (Pros.)
   Consisting of a spondee, a choriamb, and a pyrrhic; --
   applied to a kind of verse in Greek and Latin poetry. -- n.
   (Pros.) A glyconic verse.
   [1913 Webster]