#1 echoic a. [imitative, onomatopoeic, onomatopoeical, onomatopoetic] (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. wn
#2 echoic s. [echolike] like or characteristic of an echo. wn
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