Dar"trous (?), a. [F. dartreux.
See Dartars.] (Med.) Relating to, or partaking of
the nature of, the disease called tetter; herpetic.
Dartrous diathesis, A morbid condition of
the system predisposing to the development of certain skin diseases,
such as eczema, psoriasis, and pityriasis. Also called rheumic
diathesis, and herpetism. Piffard.