Source : Webster's Revised Unabridged Dictionary (1913)

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

   {Erectile tissue} (Anat.), a tissue which is capable of being
      greatly dilated and made rigid by the distension of the
      numerous blood vessels which it contains.

Source : WordNet®

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: {cavernous}]