A Trinary consists of three Stars and is commanded by a Star Captain. A Trinary varies in size depending upon the type of units it consists of. A Mech Trinary consists of 15 OmniMechs or BattleMechs. An Armor Trinary consists of 30 tanks or 30 vechicles of any type. An Infantry Trinary consists of 75 Elemental troopers or 375 non-battlesuited troopers. An Aero Trinary consists of 30 Aerospace Fighters or 30 VTOLs. A Naval Trinary consists of 15-18* Warships or Jumpships or Dropships. * Warship and Jumpship Trinaries often include an additional Command Vessel.

Trinary is an artistic language in David Brin's Uplift series of science fiction novels, spoken largely by dolphins or "neo-fins." The language is largely regarded to have high poetic potential, and is in fact ideal for such things as the construction of any poetry, from haikus to dirty limericks.