adj :  happening, arriving, existing, or performed before the proper, usual, or intended time : esp  :  born after a gestation period of less than 37 weeks < babies>  pre*ma*ture*ly adv 
, n :  PREEMIE .
 
  chiefly Brit   
 
Similar sounding terms:  hy·per·me·tria  pe·rim·e·ter  pe·rim·e·try  pre·mo·tor 
 
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