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]