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Webster 1913 Edition
Heterogamy
1.
(Bot.)
The process of fertilization in plants by an indirect or circuitous method; – opposed to orthogamy.
2.
(Biol.)
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. Claus & Sedgwick.