extinctions

Noun

extinction (countable and uncountable, plural extinctions)

1. The action of making or becoming extinct; annihilation.
   • Thirteen long centuries have elapsed since the extinction of the last Zoroastrian Empire[…]1922, Maneckji Nusservanji Dhalla, Zoroastrian Civilization, page 41
2. The absorption or scattering of electromagnetic radiation emitted by astronomical objects by intervening dust and gas before it reaches the observer.
3. The inability to perceive multiple stimuli simultaneously.
4. The fading of a conditioned response over time if it is not reinforced.