| thunder sheet | |
| —n | |
| a large sheet of metal that can be shaken to produce a noise resembling thunder as a sound effect for a theatrical production | |
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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. |