Wordnet 3.0
NOUN (1)
1. 
 a specialist in phonology; 
The Collaborative International Dictionary of English v.0.48:
Phonologist \Pho*nol"o*gist\, n.
   One versed in phonology.
   [1913 Webster]
WordNet (r) 3.0 (2006):
phonologist
    n 1: a specialist in phonology