英语词汇“ultramicroscopic virus”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

b. Medicine and Biology. In early use more fully filterable virus, ultramicroscopic virus. An infectious, often pathogenic agent or biological entity which is typically smaller than a bacterium, which is able to function only within the living cells of a host animal, plant, or microorganism, and which consists of a nucleic acid molecule (either DNA or RNA) surrounded by a protein coat, often with an outer lipid membrane.Viruses were originally distinguished from other pathogenic agents only by size, in that they could pass through filters that retained bacteria and could not be seen with the light microscope. Organisms such as mycoplasmas, which are also smaller than ordinary bacteria, would also have been included among the filterable viruses (cf. virus pneumonia n. at Compounds 2).herpes, mosaic, orphan, rabies virus, etc.: see the first element. See also adenovirus n., coronavirus n. 1, enterovirus n., myxovirus n., potyvirus n., retrovirus n., etc.

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1900 Jrnl. Compar. Pathol. & Therapeutics 13 16 The virus of foot-and-mouth disease passes through a Berkefeld filter when it is suspended in a watery liquid.

1915 Lancet 4 Dec. 1242/2 It is quite possible that an ultra-microscopic virus belongs somewhere in this vast field of life more lowly organised than the bacterium or amœba.

1928 Daily Tel. 10 July 9/4 Dr. Gye's theory of the causation of cancer by a filtrable virus.

1931 Nature 10 Oct. 599/2 But a few years ago I think that we should have had no difficulty in accepting three cardinal properties as characterising a virus, namely, invisibility by ordinary microscopic methods, failure to be retained by a filter fine enough to prevent the passage of all visible bacteria, and failure to propagate itself except in the presence of, and perhaps in the interior of, the cells which it infects.

1946 A. Nelson Princ. Agric. Bot. xxiv. 464 Some viruses have been isolated from the host, and all have proved to be some form of nucleic acid; they are of the nature of nucleo-proteins.

1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) ii. 25 There are some particles smaller than any known cell, the viruses, which are regarded by some biologists as being alive.

1963 J. H. Burn Drugs, Med. & Man xix. 188 One view is that these cells contain a virus and the cancer begins when the virus is no longer kept under control.

1984 M. J. Taussig Processes in Pathol. & Microbiol. (ed. 2) iii. 348 After the bite and deposition of saliva of an infected animal, the virus multiplies locally in the wound for a few days.

2006 Seed Sept. 21/1 There is a general feeling that the extinction of anything—save a few lethal viruses, perhaps—is to be avoided.

单词	ultramicroscopic virus
释义	> as lemmas ultramicroscopic virus b. Medicine and Biology. In early use more fully filterable virus, ultramicroscopic virus. An infectious, often pathogenic agent or biological entity which is typically smaller than a bacterium, which is able to function only within the living cells of a host animal, plant, or microorganism, and which consists of a nucleic acid molecule (either DNA or RNA) surrounded by a protein coat, often with an outer lipid membrane.Viruses were originally distinguished from other pathogenic agents only by size, in that they could pass through filters that retained bacteria and could not be seen with the light microscope. Organisms such as mycoplasmas, which are also smaller than ordinary bacteria, would also have been included among the filterable viruses (cf. virus pneumonia n. at Compounds 2).herpes, mosaic, orphan, rabies virus, etc.: see the first element. See also adenovirus n., coronavirus n. 1, enterovirus n., myxovirus n., potyvirus n., retrovirus n., etc. ΚΠ 1900 Jrnl. Compar. Pathol. & Therapeutics 13 16 The virus of foot-and-mouth disease passes through a Berkefeld filter when it is suspended in a watery liquid. 1915 Lancet 4 Dec. 1242/2 It is quite possible that an ultra-microscopic virus belongs somewhere in this vast field of life more lowly organised than the bacterium or amœba. 1928 Daily Tel. 10 July 9/4 Dr. Gye's theory of the causation of cancer by a filtrable virus. 1931 Nature 10 Oct. 599/2 But a few years ago I think that we should have had no difficulty in accepting three cardinal properties as characterising a virus, namely, invisibility by ordinary microscopic methods, failure to be retained by a filter fine enough to prevent the passage of all visible bacteria, and failure to propagate itself except in the presence of, and perhaps in the interior of, the cells which it infects. 1946 A. Nelson Princ. Agric. Bot. xxiv. 464 Some viruses have been isolated from the host, and all have proved to be some form of nucleic acid; they are of the nature of nucleo-proteins. 1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) ii. 25 There are some particles smaller than any known cell, the viruses, which are regarded by some biologists as being alive. 1963 J. H. Burn Drugs, Med. & Man xix. 188 One view is that these cells contain a virus and the cancer begins when the virus is no longer kept under control. 1984 M. J. Taussig Processes in Pathol. & Microbiol. (ed. 2) iii. 348 After the bite and deposition of saliva of an infected animal, the virus multiplies locally in the wound for a few days. 2006 Seed Sept. 21/1 There is a general feeling that the extinction of anything—save a few lethal viruses, perhaps—is to be avoided. extracted from virusn. < as lemmas
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> as lemmas