|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
paracentesis par·a·cen·te·sis (pār'ə-sěn-tē'sĭs)
Surgical puncture or tapping of a fluid-filled body cavity, especially the abdomen, with a hollow needle or trochar to withdraw fluid.