A member of an intelligence agency whose identity or affiliation is kept confidential.

Any compound that has an affinity for water such that it will extract it from other materials; a desiccant

A spy who pretends to be a double agent for one side, while actually acting as a double agent for the other side.

plural of triple agent

A person who organizes the publicity for a firm or organization, and acts as an intermediary with the press and other media

plural of press agent

(US, law) A pathogen or biological toxin which has been declared to have the potential to pose a severe threat to public health and safety.

plural of select agent

A person who represents writers and their written works to publishers and film producers and assists in the sale and deal negotiation of the same.

plural of improving agent