\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.