资料来源 : Webster's Revised Unabridged Dictionary (1913)

Ovisac \O"vi*sac\, n. [Ovum + sac.] (Anat)
   (a) A Graafian follicle; any sac containing an ovum or ova.
   (b) The inner layer of the fibrous wall of a Graafian
       follicle.