What is the X in X-mas?
c.1400, from Old French prepuce, from Latin praeputium "foreskin," possibly from præ- "before" (see pre-) + *putos "penis." Earlier in English as prepucy (late 14c.), directly from Latin.
preputial pre·pu·tial (prē-pyōō'shəl)adj. Of or relating to the prepuce.
prepuce pre·puce (prē'pyōōs')n.
A loose fold of skin covering the glans clitoridis.