\In*cest"tu*ous\ (?; 135), a. [L. incestuosus: cf.
F. incestueux.]
Guilty of incest; involving, or pertaining to, the crime of
incest; as, an incestuous person or connection. --Shak.
      Ere you reach to this incestuous love, You must divine
      and human rights remove.                 --Dryden.
-- {In*cest"tu*ous*ly}, adv. -- {In*cest"tu*ous*ness}, n.