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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
oxygenation ox·y·gen·a·tion (ŏk'sĭ-jə-nā'shən)
n.
The addition of oxygen to a chemical substance or physical system.