Definition of trigone in English:



  • A triangular region or tissue, particularly the area at the base of the urinary bladder, between the openings of the ureters and urethra.

    • ‘It can appear as a solid infiltrative lesion or as a polypoid intraluminal mass that arises in the base of the bladder or in the region of the bladder trigone.’
    • ‘Because the urethra and trigone are estrogen-dependent tissues, estrogen deficiency can contribute to urinary incontinence and urinary dysfunction.’
    • ‘Intraventricular meningiomas are rare but typically occur around the choroid plexus in the trigone of the lateral ventricles.’
    • ‘The computed tomography said it all; a malignant intrinsic tumour at the trigone of the lateral ventricle, probably a glioblastoma.’
    • ‘This artery, which supplies the trigone of the bladder, occurred in 48 of 66 bodies.’


Mid 19th century: from French, from Latin trigonum ‘triangle’.