spontaneous generation


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generation

 [jen″er-a´shun]
1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.
alternate generation reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation (direct generation) production of a new organism not originating from union of gametes.
first filial generation the first-generation offspring of two parents; symbol F1.
parental generation the generation with which a particular genetic study is begun; symbol P1.
second filial generation all of the offspring produced by two individuals of the first filial generation; symbol F2.
sexual generation production of a new organism from the cell formed by the union of a male gamete (spermatozoon) and a female gamete (oocyte).
spontaneous generation the discredited concept of continuous generation of living organisms from nonliving matter.

spon·ta·ne·ous gen·er·a·tion

the false concept according to which living matter can arise through the vitalization of nonliving matter.
See also: biogenesis.
Synonym(s): heterogenesis (3)

spontaneous generation

spon·ta·ne·ous gen·er·a·tion

(spon-tā'nē-ŭs jen'ĕr-ā'shŭn)
The false concept according to which living matter can arise by the vitalization of nonliving matter.
See also: biogenesis
Synonym(s): heterogenesis (3) .

spontaneous generation

or

abiogenesis

a discredited belief that living organisms could arise from nonliving things that was finally shown to be untrue by PASTEUR in his famous swan-neck flask experiments.
References in periodicals archive ?
Caption: Figure 6: Effect of spontaneous generation speed on equilibrium.
Simply speaking, the faster the speed of the spontaneous generation is, the higher the equilibrium number of the pessimistic is.
The evidence was clear: The theory of spontaneous generation was done for.
That Aristotle mentions "pneuma" here is clearly connected with his discussion about the spontaneous generation of life-forms in the sea, which in his view possesses intrinsic life-promoting heat in shallow places.
A: Spontaneous generation is the origin of life in the wild.
If spontaneous generation is the central trope of Egyptian earthiness, then Egypt is linked to the complex and problematic history of this concept, which raises some of the central issues of the play.
If successful, these scientists may uncover clues about how the original "spontaneous generation" of life occurred billions of years ago.
Monasteries do not come into existence by spontaneous generation. One monastery can only be founded from another one.
See, these busts bloomed on the mountain top, a spontaneous generation like maggots appearing on rotting meat.
Under these conditions, full control of how and where nanocrystals develop has been achieved by selective activation of the exact surface to be grown and spontaneous generation of intricate 3-D structures, which cannot be produced otherwise.
Much has been written about the construction and performance of femininity according to the standard of the male subject, but in the world Finucci evokes this standard turns out to be anything but reliable: Finucci's is a world where fatherhood has a dangerous rival in spontaneous generation, where a man can become a father without sexual intercourse with a woman; it is a world where a mother's imagination can erase the father's influence on their child and where fathers have their little boys castrated for the sake of music and social advancement.
These same authors will go on to discuss the theory of spontaneous generation which was discarded many years ago.

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