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Noun: heterogamy  ,he-tu'ró-gu-mee
  1. That form of alternate generation in which two kinds of sexual generation, or a sexual and a parthenogenetic generation, alternate; - in distinction from metagenesis, where sexual and asexual generations alternate
  2. The process of fertilization in plants by an indirect or circuitous method; - opposed to orthogamy

Derived forms: heterogamies

Encyclopedia: Heterogamy