noun, noun or participle which takes 'suru', intransitive verb
extinction; annihilation; dying out
Refers to the complete disappearance of a species, group, or phenomenon. Often used in biological, ecological, or formal contexts. Can be used as a noun or with する to mean 'become extinct'.
高温で細菌が死滅した。
The bacteria died out at high temperature.
Dinosaurs died out about 66 million years ago.