Definition of "penis" []

• The male organ of copulation in higher vertebrates, homologous with the clitoris. In mammals, it also serves as the male organ of urinary excretion. (noun)
• Any of various copulatory organs in males of lower animals. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The main substance of the penis is composed of three cavernous bodies, the paired _corpora cavernosa penis_, and the single _corpus spongiosum_, or"
• "The term penis enlargement refers to the ability to achieve your maximum possible penis size and varies based on your condition."
• "At any rate, a penis is a penis, no matter what country."