Wordnet 3.0
NOUN (1)
1. 
 a tight-fitting garment of stretchy material that covers the body from the shoulders to the thighs (and may have long sleeves or legs reaching down to the ankles); 
 worn by ballet dancers and acrobats for practice or performance; 
[syn: leotard, unitard, body suit, cat suit]
WordNet (r) 3.0 (2006):
body suit
    n 1: a tight-fitting garment of stretchy material that covers
         the body from the shoulders to the thighs (and may have
         long sleeves or legs reaching down to the ankles); worn by
         ballet dancers and acrobats for practice or performance
         [syn: leotard, unitard, body suit, cat suit]