al·​lo·​preen | \ˈa-lə-ˌprēn \
allopreens; allopreened; allopreening

Definition of allopreen 

of a bird

: to preen or groom the skin or feathers of another bird On other occasions in succeeding weeks the female allopreened her mate, who sometimes solicited by putting his head down.— Lawrence Kilham, The American Crow and the Common Raven, 1991 Allopreening in birds is usually directed at the top of the head, a part of the body not easily reached by the recipient.— James F. Wittenberger, Animal Social Behavior, 1981

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First Known Use of allopreen

1965, in the meaning defined above

History and Etymology for allopreen

allo- + preen entry 3

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The first known use of allopreen was in 1965

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