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metagenesis

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n. 世代交替

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世代交替

WordNet (r) 3.0 (2006) (WordNet)

metagenesis
n 1: alternation of sexual and asexual generations [synonym:
{metagenesis}, {digenesis}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Metagenesis \Met`a*gen"e*sis\, n. [Pref. meta- genesis.]
1. (Biol.) The change of form which one animal species
undergoes in a series of successively produced
individuals, extending from the one developed from the
ovum to the final perfected individual. Hence, metagenesis
involves the production of sexual individuals by nonsexual
means, either directly or through intervening sexless
generations. Opposed to {monogenesis}. See {Alternate
generation}, under {Generation}.
[1913 Webster]

2. (Biol.) Alternation of sexual and asexual or gemmiparous
generations; -- in distinction from {heterogamy}.
[1913 Webster]

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英文字典中文字典相关资料:

METAGENESIS Definition Meaning - Merriam-Webster
The meaning of METAGENESIS is alternation of generations in animals; especially : regular alternation of a sexual and an asexual generation
Alternation of generations | Definition Examples | Britannica
In algae, fungi, and plants, alternation of generations is common It is not always easy to observe, however, since one or the other of the generations is often very small, even microscopic The sexual phase, called the gametophyte generation, produces gametes, or sex cells, and the asexual phase, or sporophyte generation, produces spores asexually In terms of chromosomes, the gametophyte is

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