Source : WordNet®

echoic
     adj 1: (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: {imitative}, {onomatopoeic},
             {onomatopoeical}, {onomatopoetic}] [ant: {nonechoic}]
     2: like or characteristic of an echo [syn: {echolike}]