| panic button | |
| —n | |
| 1. | a button or switch that operates any of various safety devices, for use in an emergency |
| 2. | informal hit the panic button, press the panic button to react to a situation by demanding emergency action; become excited; panic |
| 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. |