Wiktionary
die-off
n. (context chiefly biology English) The act or process of die off; extinction.
Usage examples of "die-off".
The thicker walls of the farm and the forest biome had afforded the plants some protection, and although there would be some die-offs, and an entire crop they could not eat, the seed stocks were not harmed.
The thicker walls of the farm and the forest biome had afforded the plants some protection, and although there would be some die-offs, the seed stocks were not harmed.