| 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] |
| tripletail |
any of several chiefly marine fishes having large, trailing dorsal and anal fins that resemble tails. |
| triplex |
triple; threefold. [2 definitions] |
| triplicate |
a set or group of three identical copies, or any one of these three (often prec. by "in"). [2 definitions] |
| triploblastic |
having three germ layers, the ectoderm, endoderm, and mesoderm. |