emprosthotonos

from The Collaborative International Dictionary of English v.0.48

Emprosthotonos \Em`pros*thot"o*nos\, n. [NL., fr. Gr. ? forward
   + ? to draw.] (Med.)
   A drawing of the body forward, in consequence of the
   spasmodic action of some of the muscles. --Gross.
   [1913 Webster]