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intergradation

American  
[in-ter-grey-dey-shuhn] / ˌɪn tər greɪˈdeɪ ʃən /

noun

  1. the act or process of intergrading or the state of being intergraded.

  2. an evolutionary process by which different species of organisms tend to merge through a series of intermediate stages or grades.


Other Word Forms

Etymology

Origin of intergradation

First recorded in 1870–75; inter- + gradation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

If specimens were available they would undoubtedly show intergradation to exist between osgoodi and absonus.

From The Pocket Gophers (Genus Thomomys) of Utah, Vol. 1 No. 1 Kansas University Publications. by Stephen D. Durrant

Two specimens from Escalante, Garfield County, are referred to absonus, but they show intergradation with dissimilis.

From The Pocket Gophers (Genus Thomomys) of Utah, Vol. 1 No. 1 Kansas University Publications. by Stephen D. Durrant

The two kinds intergrade also in northeastern California, although in that state S. v. daggeti, rather than S. v. ruber, is involved in the intergradation.

From Speciation of the Wandering Shrew by James S. Findley

In measurements, the Tamaulipan specimens agree closely with miradorensis; in color, some resemble miradorensis but others approach fuscus, possibly indicating intergradation between the two subspecies in the material at hand.

From The Recent Mammals of Tamaulipas, Mexico by Ticul Alvarez

In this area, therefore, the zone of intergradation between the smaller lowland shrew and the larger montane shrew is more gradual and gradually intergrading populations are found over a relatively large area.

From Speciation of the Wandering Shrew by James S. Findley

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