Source : Webster's Revised Unabridged Dictionary (1913)

Cavernous \Cav"ern*ous\, a. [L. cavernosus: cf. F. caverneux.]
   1. Full of caverns; resembling a cavern or large cavity;
      hollow.

   2. Filled with small cavities or cells.

   3. Having a sound caused by a cavity.

   {Cavernous body}, a body of erectile tissue with large
      interspaces which may be distended with blood, as in the
      penis or clitoris.

   {Cavernous respiration}, a peculiar respiratory sound andible
      on auscultation, when the bronchial tubes communicate with
      morbid cavities in the lungs.

Source : WordNet®

cavernous
     adj 1: being or suggesting a cavern; "vast cavernous chambers
            hollowed out of limestone"
     2: filled with vascular sinuses and capable of becoming
        distended and rigid as the result of being filled with
        blood; "erectile tissue"; "the penis is an erectile organ"
        [syn: {erectile}]