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Trinidad and Tobago a southeastern West Indian country that comprises the islands of Trinidad and Tobago.
Trinitarian of or pertaining to the Christian doctrine of the Trinity. [4 definitions]
trinitrotoluene see TNT.
trinity a closely related group of three, or the state of being threefold. [2 definitions]
Trinity Sunday the Sunday after Pentecost, celebrated by certain Christians in honor of the Trinity; Whitsunday.
trinket a small piece of jewelry or other decorative object, usu. inexpensive. [2 definitions]
trinomial an algebraic expression consisting of three terms that are connected by plus or minus signs. [4 definitions]
trio in music, a group of three singers or players. [3 definitions]
triode a vacuum tube that contains an anode, cathode, and control grid.
trioxide an oxide that contains three oxygen atoms in each molecule.
trip a journey, voyage, or excursion. [18 definitions]
tripartite consisting of three parts. [2 definitions]
tripe the stomach wall of a cow or other ruminant, used as food.
triphammer a heavy, power-operated hammer that is raised and then allowed to fall by a tripping device.
triphosphate a salt or acid that contains three phosphate groups, such as adenosine triphosphate.
triple three times the amount of. [9 definitions]
Triple Crown in U.S. horse racing, a horse's winning of the Kentucky Derby, the Preakness, and the Belmont Stakes in the same year. [2 definitions]
triple jump a track-and-field event in which the jumper takes a running start and makes three consecutive jumps for horizontal distance.
triple play in baseball, a play by the defensive team that puts three offensive players out.
triple-space to type (copy) on every third line, leaving two blank lines in between.
triplet one of three children born at a single birth. [4 definitions]