ˈsits- noun
Etymology: participle translation of German sitzbad, from sitz act of sitting (from Middle High German siz, from sitzen to sit, from Old High German sizzen ) + bad bath — more at sit
1. : a tub in which one bathes in a sitting posture
2. : a bath used especially in postoperative cases in which the hips and thighs of the patient are immersed in hot water for the therapeutic effect of the moist heat in the perineal and anal regions