The Collaborative International Dictionary of English v.0.48:

Virginal \Vir"gin*al\, a. [L. virginalis: cf. F. virginal.]
   Of or pertaining to a virgin; becoming a virgin; maidenly.
   "Chastity and honor virginal." --Spenser.
   [1913 Webster]

   Virginal generation (Biol.), parthenogenesis.

   Virginal membrane (Anat.), the hymen.
      [1913 Webster]

WordNet (r) 3.0 (2006):

virginal membrane
    n 1: a fold of tissue that partly covers the entrance to the
         vagina of a virgin [syn: hymen, maidenhead, virginal
         membrane]