pair bond

noun Animal Behavior.
1.
a partnership between a mating couple that lasts through one season, serving primarily in the cooperative rearing of young.
2.
the couple that forms such a partnership.

Origin:
1935–40

Dictionary.com Unabridged

pair-bond

[pair-bond] Animal Behavior.
verb (used without object)
1.
(of a mating couple) to form and maintain a pair bond.
noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
pair bond
 
n
the exclusive relationship formed between a male and a female, esp in some species of animals and birds during courtship and breeding
 
pair bonding
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

pair bond n.
The temporary or permanent association formed between a female and male animal during courtship and mating.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Lovejoy's explanation for the origin of bipedalism thus comes down to the monogamous pair bond.
As winter deepens and the pair bond is sealed, great horned owls set up housekeeping.
Males engage in a flight courtship display to impress the females, and a monogamous pair bond is formed.
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