Opisthotonos

·noun A tetanic spasm in which the body is bent backwards and stiffened.

opisthotonos
ŏpisthŏtŏnos, i, m., = ὀπισθότονος, I a disease in which the body is violently curved backwards , a...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.