Definition of opisthotonic in US English:

opisthotonic

adjective

Medicine
  • Of, relating to, or affected with opisthotonos.

Origin

Early 17th century (in an earlier sense). As noun from classical Latin opisthotonicus a person suffering from opisthotonos, in post-classical Latin also a horse suffering from opisthotonos; as adjective from its etymon Hellenistic Greek οπισθοτονικός relating to, or affected with opisthotonos from ancient Greek ὀπισθότονος + -ικός.