Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • intransitive verb To merge into each other in a series of stages, forms, or types.
  • noun A transitional stage, form, or type.

from The Century Dictionary.

  • To become alike gradually, or approach in character by degrees, as one animal or plant compared with another; be graduated with diminishing degrees of difference, or graded into one another, as two or more species. See the extract.
  • noun An intermediate grade.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb To pass or change from one state to another by steps or stages.

Etymologies

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Examples

  • My favorite falcon in the world, the Altai, is probably a natural hybrid or, if you merge the species, "intergrade" of the Gyr and Saker.

    "Genetic Pollution"? 2005

  • Perhaps Darwin's most important insight was his realization that species are not immutable, that they can intergrade over time in an "insensible series."

    At What Level did this Evolve? 2009

  • Perhaps Darwin's most important insight was his realization that species are not immutable, that they can intergrade over time in an "insensible series."

    At What Level did this Evolve? 2009

  • Perhaps Darwin's most important insight was his realization that species are not immutable, that they can intergrade over time in an "insensible series."

    2009 November - Telic Thoughts 2009

  • Perhaps Darwin's most important insight was his realization that species are not immutable, that they can intergrade over time in an "insensible series."

    At What Level did this Evolve? 2009

  • From The Evolution List via Telic Thoughts Perhaps Darwin's most important insight was his realization that species are not immutable, that they can intergrade over time in an "insensible series."

    At What Level did this Evolve? 2009

  • They make no effort to intergrade with the whites but they quite willing for us to support them totally.

    Australia, Day Seven « Hyperpat’s HyperDay 2008

  • On drier, high elevation slopes and ridgetops, both pitch pine-scrub oak and chestnut oak forests occur, and often intergrade.

    Ecoregions of New Jersey (EPA) 2009

  • Southern Rocky Mountain fauna species intergrade with Great Plains species on Black Mesa in the western Panhandle.

    Ecoregions of Oklahoma (EPA) 2009

  • These coastal savannas intergrade with low coastal forest and scrub, which gradually give way to continuous moist forest cover further inland.

    Atlantic Equatorial coastal forests 2008

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