[in-ter-grey-dey-shuh n]


the act or process of intergrading or the state of being intergraded.
an evolutionary process by which different species of organisms tend to merge through a series of intermediate stages or grades.

Origin of intergradation

First recorded in 1870–75; inter- + gradation
Related formsin·ter·gra·da·tion·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for intergradation

Historical Examples of intergradation