<span class="searchmatch">extīnctiōnum</span> genitive plural of extīnctiō...
singular plural nominative extīnctiō extīnctiōnēs genitive extīnctiōnis <span class="searchmatch">extīnctiōnum</span> dative extīnctiōnī extīnctiōnibus accusative extīnctiōnem extīnctiōnēs...