Lewis Short
tensĭo (noun F) : tendo
* A stretching, stretching out, extension (post-Aug. and very rare).
* In gen.: papilionum, a setting up, pitching, Hyg. Gromat. init.— Plur.: bracchia, quae in eas tensiones includuntur, Vitr 1, 1 med.
* In partic., a tension or contraction of the nerves, as a disease: nervorum,Scrib. Comp. 101; 255: praecordiorum,id. ib. 260; Veg. Vet. 1, 53 fin.
Charlton T. Lewis, Charles Short, A Latin Dictionary