Bible Dictionaries
Trigone

Webster's Dictionary

(n.) A smooth triangular area on the inner surface of the bladder, limited by the apertures of the ureters and urethra.

Bibliography Information
Webster, Noah. Entry for 'Trigone'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/trigone.html. 1828.