Source : Webster's Revised Unabridged Dictionary (1913)

Tetter \Tet"ter\, n. [OE. teter, AS. teter, tetr; akin to G.
   zitter, zittermal, OHG. zittaroch, Skr. dadru, dadruka, a
   sort of skin disease. [root]63, 240.] (Med.)
   A vesicular disease of the skin; herpes. See {Herpes}.

   {Honeycomb tetter} (Med.), favus.

   {Moist tetter} (Med.), eczema.

   {Scaly tetter} (Med.), psoriasis.

   {Tetter berry} (Bot.), the white bryony.