al·​lo·​groom | \ˈa-lō-ˌgrüm \
allogrooms; allogroomed; allogrooming

Definition of allogroom 

: to clean and maintain the appearance of an individual of the same species A female rhesus monkey may allogroom the male as a means of overcoming his aggression.— Desmond Morris, Primate Ethology, 2005 However, allogrooming is one of the most easily ritualized of all social behaviors, and it has been repeatedly and consistently transformed into conciliatory and bonding signals.— Edward O. Wilson, Sociobiology, 1980 Several days after parturition, the mare and foal begin to allogroom.— George H. Waring, Horse Behavior, 2003

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First Known Use of allogroom

1974, in the meaning defined above

History and Etymology for allogroom

allo- + groom entry 2

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The first known use of allogroom was in 1974

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