That which designates; a distinguishing mark or name; distinctive title; appellation.
Selection and appointment for a purpose or office; allotment; direction.
signification, meaning, for example of a word or phrase.
An act or instance of designating; a pointing out or showing; indication.
A set of labels applied to the various objects in a system.
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.