What is the X in X-mas?
tympanitic tym·pa·nit·ic (tĭm'pə-nĭt'ĭk)
Of or relating to tympanites.
Of or relating to the quality of sound elicited by percussing over the inflated intestine or over a large pulmonary cavity; tympanic.
tympanites tym·pa·ni·tes (tĭm'pə-nī'tēz)
A distention of the abdomen resulting from the accumulation of gas or air in the intestine or peritoneal cavity. Also called meteorism, tympany.