Source : Webster's Revised Unabridged Dictionary (1913)

Vulva \Vul"va\, n. [L. vulva, volva, from volvere to roll.]
   1. (Anat.) The external parts of the female genital organs;
      sometimes, the opening between the projecting parts of the
      external organs.

   2. (Zo["o]l.) The orifice of the oviduct of an insect or
      other invertebrate.

Source : WordNet®

vulva
     n : external parts of the female genitalia
     [also: {vulvae} (pl)]