The nature of a convergent boundary depends on the type of plates that are colliding. Where a dense oceanic plate collides with a less-dense continental plate, the oceanic plate is typically thrust underneath because of the greater buoyancy of the continental lithosphere, forming a subduction zone.
Medical Definition of URINAL. 1. : a vessel so constructed that it can be used for urination by a bedridden patient. 2. : a container worn by a person with urinary incontinence.
Urination is the release of urine from the urinary bladder through the urethra to the urinary meatus outside of the body. It is the urinary system's form of excretion. It is also known medically as micturition, voiding, uresis, or, rarely, emiction, and known colloquially by various names including tinkling, peeing, weeing, whizzing and pissing.