: a triangular body part
specifically : a smooth triangular area on the inner surface of the bladder limited by the apertures of the ureters and urethra

Browse Nearby Words

Cite this Entry

“Trigone.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/trigone. Accessed 17 Apr. 2025.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!