Anat. [a. F. trigone, ad. L. trigōn-um TRIGON.] The triangular area at the base of the urinary bladder, between the openings of the ureters and urethra.
1835–6. Todd’s Cycl. Anat., I. 385/1. The posterior part of the trigone is thinner than the anterior.
1876. Gross, Dis. Bladder, 137. The usual seat of villous tumor is the trigone.
1898. P. Manson, Trop. Diseases, xxxii. 503. In the trigone of the bladder, there are … patches of inflammatory thickening.
