From echo + back. <span class="searchmatch">echoback</span> (uncountable) (computing) A test where data is transmitted from one system to another system and back again....
echocardiogram. anechoic applaud to the echo cheer to the echo echoacousia <span class="searchmatch">echoback</span> echo boomer echocardiogram, echocardiography echocardiology echo chamber...
double back drainback drawback draw back drop-back drop back dyke-back <span class="searchmatch">echoback</span> elephantback face like the back end of a bus failback failed back syndrome...