| trigger |
a small lever that when pressed or pulled causes a firearm to fire, or a similar lever on another device or machine. [4 definitions] |
| trigger finger |
the finger used to pull the trigger of a gun, usu. the index finger. |
| trigger-happy |
(informal) ready to use force, esp. by firing a gun, at the slightest provocation, regardless of consequences. [2 definitions] |
| triglyceride |
an ester derived from glycerol and three fatty acid radicals which is the main component of fats and oils. |
| trigonometric function |
a function, such as sine, cosine, or tangent, expressed as the ratio of different sides of a right triangle. |
| trigonometry |
the branch of mathematics concerned with the relationships between sides and angles of right triangles, and with calculations based on these relationships. |
| trihedral |
having three planes that meet in a point. [2 definitions] |
| trihedron |
a figure formed by three planes that meet in a point; trihedral. |
| trike |
(informal) a tricycle. |
| trilateral |
three-sided. |
| trilingual |
using or speaking three languages, esp. with equal skill in all three. [2 definitions] |
| trill |
a rapid tremulous alternation of one musical tone with an adjacent whole or half tone; vibrato; tremolo. [5 definitions] |
| trillion |
the number represented by the Arabic numeral 1,000,000,000,000. [5 definitions] |
| trillium |
a perennial of the lily family that has a whorl of three leaves from which a single three-petaled flower blooms. |
| trilobate |
having three lobes; trilobed. |
| trilobite |
any of numerous extinct arthropods of the Paleozoic era that had laterally segmented external skeletons divided into three lengthwise lobes along the back. |
| trilogy |
a group of three literary or musical works by one author or composer that are related in sequence, theme, or the like. |
| trim |
to make neat, orderly, or manageable by cutting, clipping, or otherwise removing excess material. [13 definitions] |
| trimaran |
a boat with three parallel hulls. |
| trimester |
a period of three months. [2 definitions] |
| trimeter |
a line of verse consisting of three metrical feet. [2 definitions] |