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tracery an ornamental pattern of branching and interlaced bars or ribs, as in a Gothic window. [2 definitions]
trachea the tube in air-breathing animals that carries air to the lungs; windpipe. [2 definitions]
tracheo- trachea.
tracheotomy the surgical opening of the trachea through the outside of the neck.
trachoma a contagious bacterial eye infection, affecting the conjunctiva and cornea, that is characterized by inflammation, granulation, and eventual scarring.
tracing the act or process of drawing, reproducing, or recording by tracing. [2 definitions]
track a structure consisting of a pair of parallel rails connected by crosspieces, on which trains or trolleys travel. [9 definitions]
trackage the total amount of track owned by a railroad. [3 definitions]
track and field a set of athletic events, such as foot racing, high jumping, and javelin throwing, performed on or near a running track.
tracking shot in film or television photography, a shot made by a moving camera, esp. in following a moving subject.
tracking station a base, station, vessel, or the like having the necessary radar and other equipment to monitor or communicate with craft traveling through the air or in space.
trackless leaving behind no tracks. [3 definitions]
track lighting a means of illuminating a room or the like with adjustable lights that are arranged along a narrow electrified track on a wall or ceiling.
trackman a railroad employee who lays, inspects, or repairs railroad tracks. [2 definitions]
track record a record or history of actions or performance.
tracksuit a matching jacket or sweatshirt and pants designed to be worn during exercise or warm-up.
track system an educational practice in which students are placed into certain curricula of study based on evaluation of their abilities, interests, needs, or the like.
trackwalker a person who visually inspects railroad tracks as an assigned task.
tract1 an expanse of land or water, sometimes with defined boundaries. [2 definitions]
tract2 a brief essay or pamphlet, usu. on a religious or political topic, that is distributed to solicit support or adherence.
tractable easy to manage or guide; docile. [2 definitions]