A short immunoreactive sequence that is cloned to a gene and can be used to identify or purify recombinant proteins.

(uncountable) A flexible material akin to thick paper. / (countable) A rectangular sheet of this material.

(uncountable) A flexible material akin to thick paper. / (countable) A rectangular sheet of this material. / (uncountable) Poster board.

(from German) hello, good day, good afternoon

A small metal disk, attached to a dog's collar, containing identification information. / (by extension, informal) The identification tag worn around the neck by military personnel.

Text inserted into the source code of a web page to provide metadata, such as keywords for a search engine.

(idiomatic) A situation in which two individuals attempting to contact each other by telephone repeatedly do not get a live person and instead trade messages, such as by voice mail.

One of the plastic cards used in the kanban manufacturing system.

(in combination) A retail sale in which items included in the sale are tagged with a coloured tag. / (US, chiefly northeastern, dialect) A domestic sale of second-hand items; a garage sale or yard sale.

(grammar) A question inviting the listener to indicate agreement, formed by adding a “tag” word or expression to a statement. For example “You love me, don’t you?”.