intergradation
[in-ter-grey-dey-shuh n]
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noun
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
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for intergradation
Historical Examples of intergradation
The specimen shows evidence of intergradation with excubitorides.
Birds from Coahuila, MexicoEmil K. Urban
No evidence of intergradation with any other race was noted.
Speciation in the Kangaroo Rat, Dipodomys ordiiHenry W. Setzer
Intergradation is noted also in animals from Schreiber, Ontario.
North American Jumping Mice (Genus Zapus)Philip H. Krutzsch
The intergradation between cicognanii and richardsonii is gradual.
American WeaselsE. Raymond Hall
Intergradation with invicta is shown by specimens from southwestern Montana.
American WeaselsE. Raymond Hall