An animal that lays its eggs in the nest of another animal (of the same or a different species), leaving the host to care for them and the eventual young, to the detriment of the host's young.
Origin
1930s.
Definition of brood parasite in US English:
brood parasite
noun
Biology
An animal that lays its eggs in the nest of another animal (of the same or a different species), leaving the host to care for them and the eventual young, to the detriment of the host's young.