omnicide

noun

1. (countable, uncountable)The total extinction of the human species as a result of human action. Most commonly it refers to human extinction through nuclear warfare, but it can also refer to such extinction through other means such as global anthropogenic ecological catastrophe.

   “Of course, civilization exacts a price, which we and our ancestors have been paying for millennia. But since the high technology of capitalism and the whip of the marketplace have become so efficient, the price has become correspondingly onerous. So onerous that the dread word “genocide” is being supplanted by even more ominous words—“omnicide” and “geocide.””

   “How extraordinary that Curtis LeMay believed for the rest of his life that the United States “lost” the Cuban missile crisis and the Cold War. If John Kennedy had followed LeMay's advice [to bomb Cuba and take out the missile sites], history would have forgotten the Nazis and their terrible Holocaust. Ours would have been the historic omnicide.”

2. (countable, rare)Someone or something that causes total destruction.

   “Our soils have been made sterile over many areas from pesticides, which have been really omnicides. Today, DDT as the greatest culprit, and one which has brought immense profit to the pesticide producing industry, has been spread worldwide.”

   “Ilmari? First name of a would-be Turkish papicide? A Libyan omnicide? No, merely that of an apparently mild-mannered Finn whose studies put him at the crossroads of the major influences so patently reflected in his music—those of Rachmaninoff and of the French Impressionists.”

   “[T]hese ‘super-bombs’ shatter a civilisation’s own planet but ‘the nuclear jets from the explosion could even activate their Sun, transforming it into a giant hydrogen bomb’. Perhaps supernovas are twinkling omnicides in the sky.”