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

  • noun The smaller of two conjugating gametes in an anisogamous organism.

from The Century Dictionary.

  • noun The smaller of the two conjugating cells or gametes of a colonial rhizopod. See macrogamete.
  • noun A male germ-cell; a spermatozoön.

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

  • noun biology The smaller of a pair of conjugating gametes; often the male


from Wiktionary, Creative Commons Attribution/Share-Alike License

micro- +‎ gamete


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  • The quality of maleness consists only in the size, form, and mobility of the sperm in the higher animals and of the microgamete in other cases.

    Hormones and Heredity

  • In previous discussions of the subject I have urged that the only meaning of sex was the difference between the megagamete or ovum, and the microgamete or sperm.

    Hormones and Heredity

  • But what is sex but the difference between ovum and spermatozoon, between megagamete and microgamete?

    Hormones and Heredity


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