A triangle with all sides equal is called an equilateral triangle, and a triangle with no sides equal is called a scalene triangle. An equilateral triangle is therefore a special case of an isosceles triangle having not just two, but all three sides and angles equal.
In medicine, specifically urology, dysuria refers to painful urination. Difficult urination is also sometimes, but rarely, described as dysuria. It is one of a constellation of irritative bladder symptoms (also sometimes referred to as lower urinary tract symptoms), which includes nocturia and urinary frequency.
Symptoms and Diagnosis. The most common symptom of dysuria is pain while urinating. It has also been described as burning or simply general discomfort. Other symptoms vary based on the cause of the condition, and may include frequent urination, pain near the bladder, loss of bladder control, foul smelling vaginal discharge or pain during intercourse.