labeller

An item used to identify something or someone, as a small piece of paper or cloth attached to an article to designate its origin, owner, contents, use, or destination.

A descriptive term; an epithet.

A distinctive name or trademark identifying a product or manufacturer, especially a recording company.

Architecture A molding over a door or window; a dripstone.

Heraldry A figure in a field consisting of a narrow horizontal bar with several pendants.

Chemistry See tracer.

To attach a label to.

To identify or designate with a label; describe or classify: labeled them Yuppies. See Synonyms at mark¹.

Chemistry To add a tracer to (a compound).