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单词 gnotobiotic
释义

gnotobioticadj.

/ˌnəʊtəʊbʌɪˈɒtɪk/
Etymology: < Greek γνωτός known ( < γιγνώσκειν to know) + -o suffix + -biotic comb. form.
Biology.
Of an organism (esp. a higher animal) or its environment: artificially rendered devoid of bacteria and other organisms which would normally be present as parasites, commensals, symbionts, etc., or having only a few known organisms of this kind present.
ΘΚΠ
the world > health and disease > [adjective] > of health: good > conducive to health > non-infective
sweeta1325
cleanc1384
gnotobiotic1949
1949 J. A. Reyniers et al. in Lobund Rep. Feb. 160 [After] the process of freeing an organism from its contaminants..the organism becomes gnotobiotic.
1964 F. Pohl in Galaxy Oct. 176/2 They had a gnotobiotic atmosphere, a little rich in oxygen, a little more humid than the ambient air.
1969 Nature 29 Nov. 846/1 Bacterial interactions..in gnotobiotic flies (grown from germ free eggs and fed a known mixture of bacteria).
1970 New Scientist 15 Jan. 103/1 Gnotobiotic animals..provide a highly sensitive system for detecting small numbers of micro-organisms.

Derivatives

gnotobiˈosis n. [-biosis comb. form] the state of being gnotobiotic.
ΘΚΠ
the world > health and disease > [noun] > good health > state of being conducive to > non-infectious condition
non-contagion1808
non-contagiousness1817
gnotobiosis1949
1949 J. A. Reyniers et al. in Lobund Rep. Feb. 160 The state of ‘germ-freeness’ or being without contaminants is gnotobiosis.
1953 Parasitology XLII. 260/1 As defined by Reyniers et al., gnotobiosis is synonymous with axenity only, even though gnotobiotics is proposed for the science of both axenic and synxenic cultivation; this seems inconsistent, and I feel that the term gnotobiosis should be used in the broader sense.
gnotobiˈotics n. [-ic suffix 2] the field of study concerned with rearing and using gnotobiotic organisms.
ΘΚΠ
the world > life > biology > study > [noun] > ecology > specific habitats
marine biology1880
limnology1893
limnobiology1899
cryobiology1921
hydro-biology1928
soil biology1928
aerobiology1937
astrobiology1941
gnotobiotics1949
saprobiology1958
gnotobiology1963
1949 J. A. Reyniers et al. in Lobund Rep. Feb. 160 Gnotobiotics..would be the field of investigation concerned with growing living things by themselves or in an association with other completely known kinds of organisms.
1953 Parasitology XLII. 260/1 The literature on gnotobiotics of animal organisms.
1970 New Scientist 15 Jan. 101/1 Gnotobiotics includes the study of both ‘germ-free’ animals and animals whose microbial flora can be completely specified.
This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).
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adj.1949
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