WordReference Random House Unabridged Dictionary of American English © 2025
r selection, [Ecol.]r -se•lect•ed
(är′si lek′tid),USA pronunciation adj.
- Ecologyselection occurring when a population is far below the carrying capacity of an unstable environment: tends to favor individuals that reproduce early, quickly, and in large numbers so as to make use of ephemeral resources and ensure that at least some offspring survive.