mass extinction (English, noun)
expansion: mass extinction (countable and uncountable, plural mass extinctions)
Senses:
topics: geography
geology
natural-sciences
qualifier: evolutionary theory
glosses: A sharp decrease in the total number of species in a relatively short period of time; specifically, a loss of ∼75% of all species on the planet over a geologically interval of less than 3 million years, as a result of a mass extinction event.
tags: countable
uncountable
Forms:
form: mass extinctions
tags: plural