Trochoid. Curve that would be made in the vertical plane of a point in a circle that is rolling on a horizontal plane. Is of much importance when considering motions of free waves of the sea.
Troll. To fish by drawing bait through the water.
Trooper. Troop ship. Transport.
Trooping. Royal Naval term for carrying relief crews for vessels on foreign stations, and for bringing back the crews relieved. 2. Carrying troops by sea.
Troop Ship. Vessel fitted for carrying troops and their equipment. A transport.
Tropical Air. Air that has travelled from low latitudes to high latitudes.
