'Perissad' definitions:

Definition of 'Perissad'

From: GCIDE
  • Perissad \Per"is*sad\, a. [Gr. ? odd, from ? over.] (Chem.) Odd; not even; -- said of elementary substances and of radicals whose valence is not divisible by two without a remainder. Contrasted with artiad. [Archaic] [1913 Webster]