also: にくけい
noun
Zoological term for a stalk-like structure, such as the attachment point of a barnacle or the stalk of a crinoid.
フジツボの肉茎は岩に固着する部分だ。
The peduncle of a barnacle is the part that attaches to rocks.
noun
Vulgar slang for the penis; used in explicit or crude contexts.
あの下品な漫画には肉茎の描写が多すぎる。
That vulgar manga has too many depictions of dicks.
Compound of 肉 (niku, 'flesh') and 茎 (kei, 'stalk'). The reading にっけい is a common contraction of にくけい.