| 单词 |
labelled |
| 释义 |
labelled, a.|ˈleɪbəld|
[f. label n.1 and v. + -ed.]
a. Her. Of a mitre: Having labels or infulæ (of a particular tincture). labelled line (see quot. 1753).
b. Arch. Having a label or dripstone.
c. Marked with a ticket bearing the name, description of contents, etc. of the article.
1570Levins Manip. 49/37 Labelled, infulatus. 1753Chambers Cycl. Supp., Labelled line, in heraldry, a term used by some to express the line in certain old arms, called more usually urdee or champagne. Others apply the same word to express the patee or dovetail line, called also the inclave line by Morgan. 1841R. P. Ward De Clifford II. x. 115 A castle..with..its towers, and labelled windows. 1863Boutell Heraldry Hist. & Pop. xxi. 358 Arg., on a cross sa., a mitre labelled or. 1895Bookseller's Catal., Leech himself in a nightcap sitting by the fire with a labelled bottle on the mantelshelf.
d. Biol. and Chem. Of an atom: of a different isotope (of the element normally present). Of a molecule or substance: made recognizable by labelling (see sense 2 of the vb.).
1935[see label v. 2]. 1949Ann. Rep. Progr. Chem. XLV. 244 In the acetate, both carbon atoms were derived from the labelled atom in glycine. 1953Sci. News XXIX. 35 If we take a thin sheet of a metal and deposit upon its upper surface a very thin layer of its radioactive isotope..and heat the sheet to a sufficiently high temperature, self-diffusion will occur, and the labelled atoms will move into, and about, the lattice of atoms in the sheet. 1961Lancet 29 July 258/1 [They] gave 131I-labelled insulin to pregnant rats to study the role of the placenta in the metabolism of carbohydrate. 1962R. C. Nairn Fluorescent Protein Tracing i. 3 Less commonly used is direct fluorescent tracing..in which labelled proteins are injected into animals and their distribution in the body determined by subsequent microscopy of tissue sections. 1970Sci. Amer. Mar. 92/1 After the hens had been fed the radioactive calcium for a week the skeleton became intensely labeled. |
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