trigono-, trigon- +

1. A figure having three angles and three sides; a triangle.
2. A set of three signs of the zodiac, distant 120 degrees from each other, as if at the angles of an equilateral triangle.

Triangular; related to a trigonum.

1. Any triangular area.
2. The first three dominant cusps (protocone, paracone, and metacone), taken collectively, of an upper molar tooth.

The surgical removal of the trigonum vesicae, the base of the urinary bladder.

The trigonum vesicae is a smooth triangular area on the interior of the base of the urinary bladder where the mucous membrane is firmly attached to the underlying muscle layer.

In entomology, having three broods a year.

The first three dominant cusps, taken collectively, of a lower molar tooth.

1. Inflammation of the urinary bladder.
2. Inflammation localized at the bladder trigone (trigonum vesicae), producing an edematous (swollen with an excessive accumulation of fluid) and sometimes bulbous (bulb) appearance of the mucosa of the trigone; also known as collitis.

A developmentally abnormal head in which the skull acquires a more or less triangular configuration owing to premature synostosis of cranial bones. The cerebral hemispheres tend to be compressed.

Displaying the characteristics of trigonocephaly.

That branch of mathematics that deals with the measurement of the sides and angles of triangles, particularly with certain functions of their angles or of angles in general (the sine, cosine, tangent, cotangent, secant, and cosecant), and hence with these functions as applied to abstract quantities; thus including the theory of triangles, of angles, and of (elementary) singly periodic functions.

A device for surgical incision of the bladder trigone.

1. Any triangular area.
2. Etymology: Greek > Latin trigonon, "a triangle".