phallus

[fal-uh s] /ˈfæl əs/
noun, plural phalli
[fal-ahy] /ˈfæl aɪ/ (Show IPA), phalluses.
1.
an image of the male reproductive organ, especially that carried in procession in ancient festivals of Dionysus, or Bacchus, symbolizing the generative power in nature.
2.
Anatomy. the penis, the clitoris, or the sexually undifferentiated embryonic organ out of which either of these develops.
Origin
1605-15; < Latin < Greek phallós penis
British Dictionary definitions for phallus

phallus

/ˈfæləs/
noun (pl) -luses, -li (-laɪ)
1.
another word for penis
2.
an image of the penis, esp as a religious symbol of reproductive power
Word Origin
C17: via Late Latin from Greek phallos
Word Origin and History for phallus
n.

1610s, "an image of the penis," from Latin phallus, from Greek phallos "penis," also "carving or image of an erect penis (symbolizing the generative power in nature) used in the cult of Dionysus," from PIE *bhel-no-, from root *bhel- (2) "to blow, inflate, swell" (cf. Old Norse boli "bull," Old English bulluc "little bull," and possibly Greek phalle "whale;" see bole). Used of the penis itself (often in symbolic context) from 1924, originally in jargon of psychoanalysis.

phallus in Medicine

phallus phal·lus (fāl'əs)
n. pl. phal·lus·es or phal·li (fāl'ī')

  1. The penis.

  2. The sexually undifferentiated tissue in an embryo that becomes the penis or clitoris.

  3. The immature penis considered in psychoanalysis as the libidinal object of infantile sexuality in the male.