[syn: echoic, imitative, onomatopoeic, onomatopoeical, onomatopoetic]
The Collaborative International Dictionary of English v.0.48:
Onomatopoetic \On`o*mat`o*po*et"ic\, a.
   Of or pertaining to onomatopoeia; characterized by
   onomatopoeia; imitative; as, an onomatopoetic writer or word.
   --Earle.
   [1913 Webster]
WordNet (r) 3.0 (2006):
onomatopoetic
    adj 1: of or relating to or characterized by onomatopoeia [syn:
           onomatopoeic, onomatopoetic]
    2: (of words) formed in imitation of a natural sound;
       "onomatopoeic words are imitative of noises"; "it was
       independently developed in more than one place as an
       onomatopoetic term"- Harry Hoijer [syn: echoic,
       imitative, onomatopoeic, onomatopoeical,
       onomatopoetic] [ant: nonechoic]