From semi- + extinction. <span class="searchmatch">semiextinction</span> (uncountable) Near-extinction; the property of being semiextinct....
extinctionism extinctionist hemiextinction nonextinction pseudoextinction <span class="searchmatch">semiextinction</span> Compound words and expressions age of extinction extinction burst extinction...
distinct extinction extinctive extinctively extinguish nonextinction <span class="searchmatch">semiextinction</span> of fire, etc.: no longer alight; of a light, etc.: no longer shining...