vaginae is vagina's Plural Form

vagina

US [vəˈdʒaɪnə]
UK 
  • n.【解】阴道;【动】鞘;【植】箨
Plural Form:vaginas  Plural Form:vaginae  
n.
1.
【解】阴道;【动】鞘;【植】箨,叶鞘