Definition of "vulval"

In John and Salomé, Salomé's nipples are angry blossoms, her black navel vulval, tendrilous, vaguely insectimorphic.

1990, Camille Paglia, Sexual Personae

Pythagoras, she suggests, venerated three-sided figures for their vaginal symbolism; Upper Palaeolithic dips in rock are chipped away by cavemen into vulval icons.

2003, Jenny Diski, “It's so beautiful”, in London Review of Books, XXV.22