intergrade

American  

[in-ter-greyd, in-ter-greyd] / 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

Etymology

Origin of intergrade

First recorded in 1870–75; inter- + grade

Example Sentences

See Examples For:

intergrade intergrading

They intergrade with trumbullensis in the size and shape of the zygomatic arches and tympanic bullae.

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

T. b. internatus and T. b. cultellus probably intergrade east of the Sangre De Cristo Range in the vicinity of the Colorado-New Mexico boundary.

From Geographic Variation in the Pocket Gopher, Thomys bottae, in Colorado by Youngman, Phillip M.

However, all indications point to this area as being the region where aura and teter intergrade.

From Birds from Coahuila, Mexico by Urban, Emil K.

Previously the two kinds were thought not to intergrade and were regarded as two species.

From Speciation of the Wandering Shrew by Findley, James S.

This subspecies consists of many highly variable local populations, and the marginal populations intergrade freely with adjacent races.

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

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 Atkinson, George Francis

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 Findley, James S.

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 Durrant, Stephen D.

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

From Speciation of the Wandering Shrew by Findley, James S.

These intergrading forms I have only seen in Mexican material.

From North American Species of Cactus by Coulter, John Merle