Wordnet 3.0
ADJECTIVE (1)
1. 
 having two lips; 
- Example: "the corolla of a snapdragon is bilabiate"[syn: bilabiate, two-lipped]
The Collaborative International Dictionary of English v.0.48:
Two-lipped \Two"-lipped`\, a.
   1. Having two lips.
      [1913 Webster]
   2. (Bot.) Divided in such a manner as to resemble the two
      lips when the mouth is more or less open; bilabiate.
      [1913 Webster]
WordNet (r) 3.0 (2006):
two-lipped
    adj 1: having two lips; "the corolla of a snapdragon is
           bilabiate" [syn: bilabiate, two-lipped]