erectile

from WordNet (r) 3.0 (2006)

erectile
    adj 1: capable of being raised to an upright position; "erectile
           feathers"
    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}, {cavernous}]

from The Collaborative International Dictionary of English v.0.48

Erectile \E*rect"ile\, a. [Cf. F. ['e]rectile.]
   1. Capable of being erected; susceptible of being erected of
      dilated; as, erectile tissue.
      [1913 Webster]

   2. Of or pertaining to an erection[5]; as, erectile
      dysfunction.
      [PJC]

   {Erectile tissue} (Anat.), a tissue, such as that contained
      in the penis, which is capable of being greatly dilated
      and made rigid by accumulation of blood in and the
      consequent distension of the numerous blood vessels which
      it contains.
      [1913 Webster]