Wordnet 3.0
NOUN (1)
1. 
 someone who conducts surveys of public opinion; 
- Example: "a pollster conducts public opinion polls"- Example: "a headcounter counts heads"[syn: pollster, poll taker, headcounter, canvasser]
WordNet (r) 3.0 (2006):
poll taker
    n 1: someone who conducts surveys of public opinion; "a pollster
         conducts public opinion polls"; "a headcounter counts
         heads" [syn: pollster, poll taker, headcounter,
         canvasser]