ventricle
noun /ˈventrɪkl/
/ˈventrɪkl/
(anatomy- either of the two lower spaces in the heart that pump blood to the lungs or around the body
心室 - any hollow space in the body, especially one of four main hollow spaces in the brain
（体内的）室，腔；（尤指）脑室
词源late Middle English: from Latin ventriculus, diminutive of venter ‘belly’.