Category: P

A radical or element with a valence of five.  

A compound that contains five replaceable hydrogen atoms.  

Troy weight containing 24 gr or 1/20 of a troy ounce; equal to 1.555 g. This unit of measure was previously used for describing the quantities of precious metals, as the amount of gold needed for dental restorations.  

An object in which parts extend at an angle from a central portion, as do the barbs from a feather.  

Epispadias, hypospadias, paraspadias, or any fissured condition of the penis.  

A ring made of metal, plastic, or leather. When placed around the flaccid penis, it is small enough to prevent venous return. Use of the device assists in maintaining erection of the penis and in delaying orgasm.  

A sudden traumatic injury to the tunica albuginea of the penis, resulting in a rupture of the corpus cavernosum and sometimes a tearing of the urethra. The injury typically occurs during sexual intercourse (or, less often, during masturbation) and may be accompanied by bleeding into the penis.  

A means of measuring bladder pressures during urination, in which urinary flow is interrupted by inflating a pediatric blood pressure cuff placed around the penis. The cuff pressure at which urinary flow stops is an indirect, noninvasive measure of bladder pressure during urination. The test is used to distinguish the causes of urinary hesitancy: men…

A group of the branches of arteries in the spleen that are arranged like the bristles of a brush. Each consists of successive portions: the pulp arteries, sheathed arteries, and terminal arteries.  

A substance used to determine sensitivity to some forms of penicillin. When it is injected intradermally into a sensitive individual, a wheal appears within 20 minutes.