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

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

Each of the fifty-seven animals studied from this region is an intergrade; some specimens combine the characters of three subspecies.

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

Additional specimens are needed from these areas and from the hiatus between the ranges of B. t. taylori and B. t. subater the better to understand the manner in which these two subspecies intergrade.

From Speciation and Evolution of the Pygmy Mice, Genus Baiomys by Robert L. Packard

O. a. mccallii and suttoni probably intergrade along the eastern slope of the Sierra del Carmen.

From Birds from Coahuila, Mexico by Emil K. Urban

Larger and darker than S. v. shumaginensis; the two intergrade near the base of the Kenai Peninsula.

From Speciation of the Wandering Shrew by James S. Findley

These intergrading forms I have only seen in Mexican material.

From North American Species of Cactus by John Merle Coulter

Some of the animals are practically indistinguishable in color and there are intergrading cranial characters in the nasals, zygomatic arches and tympanic bullae.

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

Sierra Nevada of California, north at least to El Dorado County, intergrading northerly with S. v. vagrans.

From Speciation of the Wandering Shrew by James S. Findley

There the lower elevations west of the Wasatch and Uinta mountains are inhabited by S. v. vagrans, the higher elevations by obscurus and where the ranges of the two abut intergrading populations occur.

From Speciation of the Wandering Shrew by James S. Findley

The peloric toad-flaxes are, as a rule, found surrounded by the normal type, but without intergrading forms.

From Species and Varieties, Their Origin by Mutation by Hugo de Vries

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