• Webster's Revised Unabridged Dictionary
    • n orthogamy (Bot) Direct fertilization in plants, as when the pollen fertilizing the ovules comes from the stamens of the same blossom; -- opposed to heterogamy.
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Century Dictionary and Cyclopedia
    • n orthogamy In botany, direct or immediate fertilization, without the intervention of any mediate agency.
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Chambers's Twentieth Century Dictionary
    • n Orthogamy or-thog′a-mi (bot.) direct or immediate fertilisation.
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Webster's Revised Unabridged Dictionary
Ortho-, + Gr. marriage