Del`e*te"ri*ous (?), a. [LL.
deleterius noxious, Gr. dhlhth`rios, fr.
dhlei^sqai to hurt, damage; prob. akin to L. delere
to destroy.] Hurtful; noxious; destructive; pernicious; as, a
deleterious plant or quality; a deleterious
example. -- Del`e*te"ri*ous*ly, adv.
-- Del`e*te"ri*ous*ness, n.