Definition of fission
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Fission (n.) A method of asexual reproduction among the lowest (unicellular) organisms by means of a process of self-division, consisting of gradual division or cleavage of the into two parts, each of which then becomes a separate and independent organisms; as when a cell in an animal or plant, or its germ, undergoes a spontaneous division, and the parts again subdivide. See Segmentation, and Cell division, under Division..
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Schizophyte ::
Schizophyte (n.) One of a class of vegetable organisms, in the classification of Cohn, which includes all of the inferior forms that multiply by fission, whether they contain chlorophyll or not..
Fissigemmation ::
Fissigemmation (n.) A process of reproduction intermediate between fission and gemmation.
Monogenesis ::
Monogenesis (n.) That form of reproduction which requires but one parent, as in reproduction by fission or in the formation of buds, etc., which drop off and form new individuals; asexual reproduction..
Encystment ::
Encystment (n.) A process which, among some of the lower forms of life, precedes reproduction by budding, fission, spore formation, etc..
Asexual ::
Asexual (a.) Having no distinct sex; without sexual action; as, asexual reproduction. See Fission and Gemmation..
Accrementition ::
Accrementition (n.) The process of generation by development of blastema, or fission of cells, in which the new formation is in all respect like the individual from which it proceeds..
Deuterozooid ::
Deuterozooid (n.) One of the secondary, and usually sexual, zooids produced by budding or fission from the primary zooids, in animals having alternate generations. In the tapeworms, the joints are deuterozooids..
Meroblastic ::
Meroblastic (a.) Consisting only in part of germinal matter; characterized by partial segmentation only; as, meroblastic ova, in which a portion of the yolk only undergoes fission; meroblastic segmentation; -- opposed to holoblastic..
Protophyte ::
Protophyte (n.) Any unicellular plant, or plant forming only a plasmodium, having reproduction only by fission, gemmation, or cell division..
Fission ::
Fission (n.) A method of asexual reproduction among the lowest (unicellular) organisms by means of a process of self-division, consisting of gradual division or cleavage of the into two parts, each of which then becomes a separate and independent organisms; as when a cell in an animal or plant, or its germ, undergoes a spontaneous division, and the parts again subdivide. See Segmentation, and Cell division, under Division..
Strobile ::
Strobilation (n.) The act or phenomenon of spontaneously dividing transversely, as do certain species of annelids and helminths; transverse fission. See Illust. under Syllidian..
Schizo- ::
Schizo- () A combining form denoting division or cleavage; as, schizogenesis, reproduction by fission or cell division..
Leptothrix ::
Leptothrix (n.) Having the form of a little chain; -- applied to bacteria when, as in multiplication by fission, they form a chain of filiform individuals..
Sporid ::
Spore (n.) One of the parts formed by fission in certain Protozoa. See Spore formation, belw..
Bacterium ::
Bacterium (n.) A microscopic vegetable organism, belonging to the class Algae, usually in the form of a jointed rodlike filament, and found in putrefying organic infusions. Bacteria are destitute of chlorophyll, and are the smallest of microscopic organisms. They are very widely diffused in nature, and multiply with marvelous rapidity, both by fission and by spores. Certain species are active agents in fermentation, while others appear to be the cause of certain infectious diseases. See Bacillus
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