DartrousDar"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.