| 单词 | clone |
| 释义 | clone[ klohn ] / kloʊn / SEE SYNONYMS FOR clone ON THESAURUS.COM nounBiology.
a person or thing that duplicates, imitates, or closely resembles another in appearance, function, performance, or style: All the fashion models seemed to be clones of one another.Several manufacturers made off-brand clones of the popular game console. verb (used with object), cloned, clon·ing.to produce a copy or imitation of. to copy identifying information from (a mobile device, credit card, security badge, etc.), usually for the purpose of identity theft or unauthorized security access: They cloned my key card and used the copy to steal all the valuables from my hotel room. Biology.
verb (used without object), cloned, clon·ing.Biology. to grow as a clone. Origin of cloneFirst recorded in 1900–05; from Greek klṓn “a slip, twig” OTHER WORDS FROM cloneclonal, adjectiveclon·al·ly, adverbcloner, nounWords nearby cloneclomiphene, clomipramine, clomp, clonal selection theory, clonazepam, clone, clonic, clonic convulsion, clonicity, clonicotonic, clonic spasm Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for cloneBritish Dictionary definitions for cloneclone / (kləʊn) / nouna group of organisms or cells of the same genetic constitution that are descended from a common ancestor by asexual reproduction, as by cuttings, grafting, etc, in plants Also called: gene clone a segment of DNA that has been isolated and replicated by laboratory manipulation: used to analyse genes and manufacture their products (proteins) informal a person or thing bearing a very close resemblance to another person or thing slang
verbDerived forms of cloneclonal, adjectiveclonally, adverbWord Origin for cloneC20: from Greek klōn twig, shoot; related to klan to break Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for cloneclone A living system that is genetically identical to its ancestor (that is, it has exactly the same DNA molecules). Because each cell contains the DNA molecules that characterize an individual, it is, in principle, possible to replicate, or reproduce, complex living systems in the laboratory. notes for cloneThe first cloned mammal, a sheep named Dolly, was born in Scotland in 1996. DNA from an adult donor was placed into an egg, which was then implanted in the uterus of another sheep. Since that time, mice, cows, and pigs have been cloned. notes for cloneThere is a major debate on the ethical aspects (see bioethics) of cloning, especially as applied to human beings. Therapeutic cloning involves the placing of adult DNA in an egg for the express purpose of creating stem cells for medical purposes. Reproductive cloning involves the placement of adult DNA into an egg and the implantation of the egg into a uterus for the purpose of creating a viable fetus. notes for cloneClone is often used informally to indicate a close copy or resemblance: “This new computer is a clone of the IBM model.” The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for cloneclone [ klōn ] n.A cell, group of cells, or organism descended from and genetically identical to a single common ancestor, such as a bacterial colony whose members arose from a single original cell. An organism descended asexually from a single ancestor, such as a plant produced by layering or a polyp produced by budding. A DNA sequence, such as a gene, that is transferred from one organism to another and replicated by genetic engineering techniques. v.Other words from cloneclon′al (klō′nəl) adj.The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for cloneclone [ klōn ] NounA cell, group of cells, or organism that is produced asexually from and is genetically identical to a single ancestor. The cells of an individual plant or animal, except for gametes and some cells of the immune system, are clones because they all descend from a single fertilized cell and are genetically identical. A clone may be produced by fission, in the case of single-celled organisms, by budding, as in the hydra, or in the laboratory by putting the nucleus of a diploid cell into an egg that has had its nucleus removed. Some plants can produce clones from horizontal stems, such as runners. Clones of other cells and some plants and animals can also be produced in a laboratory. See also therapeutic cloning. A copy of a sequence of DNA, as from a gene, that is produced by genetic engineering. The clone is then transplanted into the nucleus of a cell from which genetic material has been removed. VerbTo produce or grow a cell, group of cells, or organism from a single original cell. To make identical copies of a DNA sequence. See more at genetic engineering. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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