• WordNet 3.6
    • n heterogenesis the alternation of two or more different forms in the life cycle of a plant or animal
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Webster's Revised Unabridged Dictionary
    • Heterogenesis (Biol) Spontaneous generation, so called.
    • Heterogenesis (Biol) That method of reproduction in which the successive generations differ from each other, the parent organism producing offspring different in habit and structure from itself, the original form, however, reappearing after one or more generations; -- opposed to homogenesis, or gamogenesis.
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Century Dictionary and Cyclopedia
    • n heterogenesis Production by an external cause — that is, a cause different from the effect. Also called heterogeny.
    • n heterogenesis In biology: The spontaneous generation of animals and vegetables low in the scale of organization from inorganic elements; abiogenesis.
    • n heterogenesis That kind of generation in which the parent, whether plant or animal, produces offspring differing in structure and habit from itself, but in which after one or more generations the original form reappears. Some forms of heterogenesis are called xenogenesis, parthenogenesis, geneagenesis, and alternate generation. See biogenesis, homogenesis.
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Chambers's Twentieth Century Dictionary
    • n Heterogenesis het-er-ō-gen′e-sis (biol.) spontaneous generation, abiogenesis: generation in which the offspring differs in structure and habit from the parent animal or plant, the ancestral characteristics, however, ultimately reappearing—Xenogenesis and Alternate generation are other names—also Heterog′eny
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Webster's Revised Unabridged Dictionary
Hetero-, + genesis,
Chambers's Twentieth Century Dictionary
Gr. heteros, other, genesis, generation.


In literature:

For the distinction between Archebiosis and Heterogenesis, see Bastian, chapter vi.
"The Life and Letters of Charles Darwin, Volume II (of II)" by Charles Darwin
W. H. Dallinger's excellent 'Notes on Heterogenesis' in the October number of the Popular Science Review.
"Fragments of science, V. 1-2" by John Tyndall
From time to time there have been observers who have maintained a belief in the opposite theory, to which the name heterogenesis has been given.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7" by Various
I have a most profound lecture to give on Orthogenesis and Heterogenesis to that unfortunate Evolution class at two o'clock.
"Insect Stories" by Vernon L. Kellogg