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| 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. |
occupational disease n.
A pathological condition resulting from a toxic agent, a hazard, or a repetitive operation encountered during the usual performance of one's occupation.
A disease that is caused by a person's line of work, or occupation. A common occupational disease is carpal tunnel syndrome, which results from repetitive motion.