cath ‧ e ‧ ter /ˈkæθətə, ˈkæθɪtə $ -ər/ BrE AmE noun [countable] medical
[ Date: 1600-1700 ; Language: Late Latin ; Origin: Greek , from kathienai 'to send down' , from kata- ( ⇨ ↑ cataclysm ) + hienai 'to send' ]
a thin tube that is put into your body to remove liquids
—catheterize ( also -ise British English ) verb [transitive]