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Definition of Micropenis

Micropenis: An abnormally small penis. In medical practice, the dimension of the penis that is measured is the length. This measurement is taken along the upper surface of the shaft of the penis to the tip, using a measuring tape or, preferably, a ruler. The ruler is pressed firmly into the soft tissue over the pubic bone (the symphysis pubis) since, in obese boys and men, a seemingly small penis may be partly engulfed by the fat pad at its base and actually be quite normal in length. Normal standards are available for penile length.

True micropenis is a penis that measures significantly less than normal. This may reflects failure of normal hormonal stimulation or a failure of normal development during the formation of the embryo (a birth defect).

The prefix "micro-" is derived from the Greek "mikros" meaning small. It diminishes whatever it precedes.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=6734
Last Editorial Review: 8/28/2013

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