səˈkəshən noun
( -s )
Etymology: Latin succussion-, succussio, from succussus (past participle of succutere to throw up from below, fling up, from sub- up + quatere to shake) + -ion-, -io -ion — more at sub- , quash
: the action or process of shaking or the condition of being shaken especially with violence:
a. : a shaking of the body to ascertain if fluid is present in a cavity and especially in the thorax
b. : the splashing sound made by succussion