(geometry) A polygon with three sides and three angles. / (US, Canada) A set square.

The area comprising the cities of Raleigh, Durham and Chapel Hill in North Carolina. Used with "the" except when attributive. / Ellipsis of Bermuda Triangle.

plural of triangle

A largely tropical, Old World, erebid moth, Trigonodes hyppasia, with triangular markings on the wings.

Having three angles. / Located inside a triangle. / (heraldry) Divided into triangles (said of the field).

(geology) A depression caused by the Afar Triple Junction, which is part of the Great Rift Valley in East Africa.

plural of ideal triangle

plural of sternocostal triangle

(anatomy) Small zones lying between the costal and sternal attachments of the thoracic diaphragm.

A region on the southern end of the Nouabalé-Ndoki National Park in the Republic of the Congo.