tri-, tre-

1. Consisting of, or involving, three; threefold; triple.
2. Third in order or rank.
3. Based on the number three.
4. Pertaining to, consisting of, compounded of, or characterized by a set (or sets) of three; threefold, triple.

A ternary system (of classification), one in which each division is into three parts.

Containing three different acid radicals in the molecule.

Having three rays; said of a sponge-spicule.

1. A group or set of three (persons, things, words, attributes, etc.); three collectively or in connexion.
2. Applied to the Trinity.
3. A group of three associated or correlated deities, beings, or powers.
4. A set of three things; especially, in geometry, of three points.
5. A union or conjunction of three; a group or class of three closely associated persons or things.

In biology, a reference to stamens that are united by their filaments into three bundles; of a plant having the stamens so united.

The screening and classification of wounded, sick, or injured patients during war or another disaster to determine priority needs and thereby ensure the most efficient use of medical and surgical manpower, equipment, and facilities.

This word is here only because it should be known that it has no etymological connection with the Greek-Latin element tri, “three”.

Triage is a borrowing from Old French trier to "pick, sift, cull" and then from French triage, "a picking out, sorting" then to an act of "sorting according to kind and quality". In World War I, triage was adopted as a military term for the sorting of wounded soldiers into three groups according to the urgency of their injuries on the basis of urgency, chance for survival, etc. By 1974, this usage was extended to refer to any system of allocating limited resources according to urgency or expediency, as in the distribution of food during a famine.

Triage now refers to the screening and classification of wounded, sick, or injured patients during war or any other big disaster to determine priority needs and thereby to ensure the most efficient use of medical and surgical manpower, equipment, and facilities.

The separation of a large number of casualties, in military or civilian disaster medical care, is usually done into three groups:

1. Those who cannot be expected to survive even with treatment.
2. Those who will recover without treatment.
3. The highest priority group, those who will not survive without treatment.

“Triage” was often heard on the radio during the first few days following the destruction of the Twin Towers of the World Trade Center in New York on Tuesday, September 11, 2001; as well as the disaster of Hurricane Katrina after it pounded parts of Louisiana and Mississippi on Monday, August 29, 2005, propelling high winds and sheets of rain that not only endangered lives and property in the Gulf Coast region, but also threatened the United States and its trading partners with widespread economic disruption.

A colloquy (a conversation, especially a formal one) among three people.

In botany, having three stamens.

1. A figure (usually, a plane rectilineal figure) having three angles and three sides.
2. A group or set of three, a triad; especially, a love-relationship in which one member of a married couple is involved with a third party; frequently referred to as the eternal triangle.
3. Something having the form of a triangle; any three-cornered body, object, or space.
4. In anatomy and surgery, a three-sided area with arbitrary or natural boundaries.

1. Forming or shaped like a triangle.
2. Involving three parties or elements; such as, "The triangular mother-father-child relationship".
3. Having three sides.

A muscle of the chin.

1. To divide into triangles.
2. To survey by triangulation.
3. To make triangular.
4. To measure by using trigonometry.

1. Of or relating to triangles; triangular.
2. Made up of or marked with triangles.