LABELLING
Definition of LABELLING
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To put a label (a ticket or sign) on (something).
"The shop assistant labeled all the products in the shop."
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(ditransitive) To give a label to (someone or something) in order to categorise that person or thing.
"He's been unfairly labeled as a cheat, although he's only ever cheated once."
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To replace specific atoms by their isotope in order to track the presence or movement of this isotope through a reaction, metabolic pathway or cell.
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A set of labels applied to the various objects in a system.
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The introduction of a traceable chemical group (e.g., containing an isotope or a fluorescent dye) into a protein or other biomolecule of interest so it can be tracked or quantified during experimental analysis.
Source: Wiktionary