cavernous cavernous /ˈkævɝnəs/

adjective

1. (physiology) filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood  ( cavernous , erectile )
   (physiology) filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood
    Erectile tissue
   erectile tissue
    The penis is an erectile organ
   the penis is an erectile organ
   
2. Being or suggesting a cavern  ( cavernous )
   being or suggesting a cavern
    Vast cavernous chambers hollowed out of limestone
   vast cavernous chambers hollowed out of limestone