1) Member 2) Micropenis 3) Penis 4) Phallus 1) Micropenis 
Microphallus is a genus of parasitic trematodes (flukes) in the family Microphallidae. The Greek name means `tiny penis`. == Hosts == They are parasitic on a variety of molluscs, crustaceans, birds, and mammals, some species having complex life cycles involving more than one host. For example, Microphallus piriformes parasitizes the rough periwi.....
A congenital underdevelopment of the penis. ... (27 Sep 1997) ... 
(mi″kro-fal´әs) micropenis.
Type: Term Pronunciation: mī′krō-fal′ŭs Synonyms: micropenis
Microphallus: An abnormally small penis. Also called micropenis. In medical practice, the dimension of the penis that is measured is the length. The 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 (th...