translingual Hesperornithidae, from Hesperornis (“genus name”). <span class="searchmatch">hesperornithid</span> (plural <span class="searchmatch">hesperornithids</span>) (paleontology) Any extinct avialan in the family Hesperornithidae...
<span class="searchmatch">hesperornithids</span> plural of <span class="searchmatch">hesperornithid</span>...