Meaning

noun external parts of the female genitalia

originLearned borrowing from Latin vulva, earlier volva (“womb, female sexual organ”), probably from volvō (“to turn, wrap around”). Akin to Sanskrit उल्ब॑ (úlba) and उल्व॑ (úlva, “womb”) or English valve, valva and other descendants of the Latin term (evolve, involve, revolve).

Etymology from Wiktionary, CC BY-SA 3.0