/ ˈbaʊəl; NAmE / noun
1.
[ C , usually pl. ] the tube along which food passes after it has been through the stomach, especially the end where waste is collected before it is passed out of the body :
( medical )
to empty / move / open your bowels (= to pass solid waste out of the body)
bowel cancer / cancer of the bowel
2.
the bowels of sth [ pl. ] ( literary ) the part that is deepest inside sth :
A rumble came from the bowels of the earth (= deep underground) .
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WORD ORIGIN
Middle English : from Old French bouel , from Latin botellus , diminutive of botulus sausage.