penis
noun
pe·nis ˈpē-nəs 
plural penises also penes ˈpē-(ˌ)nēz
: a male erectile organ of copulation by which urine and semen are discharged from the body and that develops from the same embryonic mass of tissue as the clitoris
Word History
Etymology
Latin, penis, tail; akin to Old High German faselt penis, Greek peos
First Known Use
1578, in the meaning defined above
Phrases Containing penis
Kids Definition
penis
noun
pe·nis ˈpē-nəs
plural penises also penes
-ˌnēz
: a male organ in mammals through which urine and sperm leave the body
Medical Definition
penis
noun
pe·nis ˈpē-nəs
plural penes ˈpē-(ˌ)nēz or penises
or penises : the male erectile copulatory organ of a higher vertebrate animal developing from the genital tubercle that in mammals including humans usually functions as the channel by which urine and semen are discharged from the body and is typically a cylindrical organ that is suspended from the pubic arch, contains a pair of large lateral corpora cavernosa and a smaller ventromedial corpus cavernosum containing the urethra, and has a terminal glans enclosing the ends of the corpora cavernosa, covered by mucous membrane, and sheathed by a foreskin continuous with the skin covering the body of the organ