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

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

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

Both the nesting habits and eggs of this variety are the same as the last, with which species, the birds gradually intergrade as their ranges approach. 308b.

From The Bird Book Illustrating in natural colors more than seven hundred North American birds; also several hundred photographs of their nests and eggs. by Chester A. (Chester Albert) Reed

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 Stephen D. Durrant

Again the grizzly and cinnamon intergrade in such a manner that an experienced naturalist has considered them to be but extremes of a single species.

From North America by Israel C. (Cook) Russell

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

Therefore, ocius is properly to be treated as a subspecies of the series of intergrading forms of which talpoides is the earliest named.

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

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

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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