intergrade

American  

[in-ter-grayd, in-ter-grayd] / ˈɪn tərˌgreɪd, ˌɪn tərˈgreɪd /

noun

1. an intermediate grade, form, stage, etc.

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verb (used without object)

intergraded, intergrading

1. to merge gradually, one into another, as different species through evolution.

intergrade British  

verb

1. (intr) (esp of biological species, etc) to merge one into another

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noun

1. an intermediate stage or form

Other Word Forms

• intergradation
  noun
• intergradational
  adjective
• intergradient
  adjective

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Etymology

Origin of intergrade

First recorded in 1870–75; inter- + grade

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Example Sentences

See Examples For:

intergrade intergrading

In this area T. t. taxus and T. t. fippsi may intergrade.

From Mammals of the Grand Mesa, Colorado by Sydney Anderson

Remarks.—G. bursarius jugossicularis and G. bursarius industrius intergrade in the southern part of Meade County.

From Subspeciation in Pocket Gophers of Kansas, [KU. Vol. 1 No. 11] by E. Raymond (Eugene Raymond) Hall

I find these kinds to intergrade continuously one with the next in the manner described and conclude that all are of a single species.

From Speciation of the Wandering Shrew by James S. Findley

Remarks.—One specimen from Kanab is an intergrade between trumbullensis and absonus.

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

Of the Black Phoebe, the two subspecies semiatra and nigricans intergrade in Coahuila.

From Birds from Coahuila, Mexico by Emil K. Urban

But I have never found intergrading color forms, and have not yet satisfied myself as to whether or not the two should be entitled to specific rank.

From Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. by George Francis Atkinson

It inhabits the Barren Grounds from Hudson Bay north-westward to the Mackenzie, and is represented by related and intergrading forms nearly throughout Alaska, and southward in the Rocky Mountains to the northern United States.

From A Journey from Prince of Wales's Fort in Hudson's Bay to the Northern Ocean in the Years 1769, 1770, 1771, 1772 New Edition with Introduction, Notes, and Illustrations by J. B. Tyrrell

No. 31633 shows no sign of intergrading with J. p. phaeonotus to the south.

From Birds from Coahuila, Mexico by Emil K. Urban

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

Passing by many interesting members of the psychological series of intergrading forms, we reach the familiar animals like the cat and dog and horse which display what is called intelligence.

From The Doctrine of Evolution Its Basis and Its Scope by Henry Edward Crampton

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