Wordnet 3.0
NOUN (1)
1. 
 adhesions between the iris and the lens or cornea resulting from trauma or eye surgery or as a complication of glaucoma or cataract; 
 can lead to blindness; 
The Collaborative International Dictionary of English v.0.48:
Synechia \Syn*e"chi*a\, n. [NL., fr. Gr. ?, fr. ? to hold
   together; sy`n with + ? to hold.] (Med.)
   A disease of the eye, in which the iris adheres to the cornea
   or to the capsule of the crystalline lens.
   [1913 Webster]
WordNet (r) 3.0 (2006):
synechia
    n 1: adhesions between the iris and the lens or cornea resulting
         from trauma or eye surgery or as a complication of glaucoma
         or cataract; can lead to blindness