A drone was a class of insect that performed menial tasks.
Teirenian ant drones produced a fluorescent enzyme that was activated by the Queen. In 2376, Mezoti informed Kathryn Janeway of this while showing off her project for the Annual Voyager Science Fair. Janeway was surprised by the Borg-reminiscent subject matter, as the Norcadian had recently been de-assimilated. (VOY: "Child's Play")