Lewis Short
(P. a.) : concussus, a, um, Part. and , from concutio.
Charlton T. Lewis, Charles Short, A Latin Dictionary
Lewis Short
concussus (noun M) : concutio
* A shaking, concussion; only in abl. sing. in Lucr. 6, 290; 6, 547 (in Plin. 35, 16, 55, ยง 193, the better read. is concussis; v. Sillig ad h. l.).
Charlton T. Lewis, Charles Short, A Latin Dictionary