Dartrous \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.

Source: Webster's Revised Unabridged Dictionary (1913)