| TRI | a method of surveying |
|---|---|
| TRI | a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart |
| TRI | a small northern constellation near Perseus between Andromeda and Aries |
| TRI | a small bright constellation in the polar region of the southern hemisphere near Circinus and Apus |
| TRI | from 190 million to 230 million years ago |
| TRI | from 190 million to 230 million years ago |
| TRI | conenoses |
| TRI | tranquilizer and antidepressant (trade name Triavil) sometimes used as an antiemetic for adults |
| TRI | a form of benzodiazepine (trade name Halcion) frequently prescribed as a sleeping pill |
| TRI | of female homosexual behavior that attempts to simulate heterosexual behavior |
| TRI | relating to or characteristic of a tribe |
| TRI | the head of a tribe or clan |