'Lyssa' definitions:

Definition of 'lyssa'

From: WordNet
noun
An acute viral disease of the nervous system of warm- blooded animals (usually transmitted by the bite of a rabid animal); rabies is fatal if the virus reaches the brain [syn: rabies, hydrophobia, lyssa, madness]

Definition of 'Lyssa'

From: GCIDE
  • Lyssa \Lys"sa\ (l[i^]s"s[.a]), n. [NL. See Lytta.] (Med.) Hydrophobia. [1913 Webster]
  • Note: The plural (Lyss[ae]) has been used to signify the pustules supposed to be developed under the tongue in hydrophobia. [1913 Webster]