TRIAD

An Illustrated Encyclopedic Medical Dictionary · 1894 · p. 29

n. Tri'a2d. 1. A combination of three. 2. A trivalent element or radicle, [a, 48.] Hutch in son's t. The conjunction of notched teeth, interstitial keratitis, and otitis; observed in hereditary syphilis. ["Ann. m6d. et sci. du Nord-Est"; "Province med.," Oct. 6, 1888, p. 77.] [s. 643]