| 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)
n.
Surgical puncture or tapping of a fluid-filled body cavity, especially the abdomen, with a hollow needle or trochar to withdraw fluid.