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.