(Gnosticism) The name of the Demiurge or 'False God'. Created when Sophia (one of the lesser aeons) tried to emanate without her counterpart (Christ).

(mechanical engineering, rail transport, aviation, of a wheel) Equipped with brakes (the vehicle-stopping devices).

plural of Siemon

(military, US, historical) Acronym of Advanced Research Projects Agency (renamed to DARPA in 1972) / (navigation) Initialism of Automatic Radar Plotting Aid