trigone

trigone /tri·gone/ (tri´gōn)

1. triangle.

2. the first three cusps of an upper molar tooth.

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trigone of bladder  vesical t.

carotid trigone  the triangular area bounded by the posterior belly of the digastric muscle, the sternocleidomastoid muscle, and the anterior midline of the neck.

olfactory trigone  the triangular area of gray matter between the roots of the olfactory tract.

vesical trigone  the smooth triangular portion of the mucosa at the base of the bladder, bounded behind by the interureteric fold, ending in front in the uvula of the bladder.

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tri·gone (trgn)

n.

1. A triangle or trigonum.

2. The first three dominant cusps of an upper molar tooth.

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tri·gonal adj.

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trigone

[trī′gōn]

Etymology: Gk, trigonos, three-cornered

1 a triangular space, especially one at the base of the shoulder.

2 the first three dominant cusps, considered collectively, of an upper molar.

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trigone [tri´gōn]

1. triangle.

2. the first three cusps of an upper molar tooth. adj., adj trigo´nal.

trigone of bladder a triangular region of the wall of the urinary bladder, an area in which the muscle fibers are closely adherent to the mucosa; its three angles correspond with the orifices of the ureters and urethra. Called also vesical trigone.

carotid trigone the triangular area bounded by the posterior belly of the digastric muscle, the sternocleidomastoid muscle, and the anterior midline of the neck. Called also superior carotid triangle.

olfactory trigone the triangular area of gray matter between the roots of the olfactory tract.

vesical trigone trigone of bladder.

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trigone

1. a triangular area. See also triangle.

2. the primary three cusps of an upper cheek tooth.

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olfactory trigone

the triangular area of gray matter between the roots of the olfactory tract.

vesical trigone

a triangular region of the wall of the urinary bladder, the three angles corresponding with the orifices of the ureters and urethra; it is an area in which the muscle fibers are closely adherent to the mucosa.