intergradation

[ in-ter-grey-dey-shuhn ]

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 Words From

• inter·gra·dation·al adjective

Word History and Origins

Origin of intergradation¹

First recorded in 1870–75; inter- + gradation

Example Sentences

Nevertheless, the two specimens are clearly referable to their respective species and show no tendency toward intergradation.

From Project Gutenberg

Intergradation was noted in animals from 23 miles southwest of Newcastle and Arvada, Wyoming.

From Project Gutenberg

Intergradation occurs with the latter subspecies at Vernal, Uintah County, in cranial measurements and in color.

From Project Gutenberg

Intergradation has been noted in specimens from the eastern and southeastern shores of Great Salt Lake.

From Project Gutenberg

Intergradation with Dipodomys ordii fetosus occurs near Lund.

From Project Gutenberg