The Collaborative International Dictionary of English v.0.48:

Gonidial \Go*nid"i*al\, a. (Bot.)
   Pertaining to, or containing, gonidia.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gonidial \Go*nid"i*al\, a. (Zool.)
   Of or pertaining to the angles of the mouth; as, a gonidial
   groove of an actinian.
   [1913 Webster]