nympha

from The Collaborative International Dictionary of English v.0.48

nympha \nym"pha\, n.; pl. {Nymphae}. [L. See {Nymph} a goddess.]
   1. (Zool.) Same as {Nymph}, 3.
      [1913 Webster]

   2. pl. (Anat.) Two folds of mucous membrane, within the
      labia, at the opening of the vulva.
      [1913 Webster]