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| a scrap or morsel of food left at a meal. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| cardiac arrest | |
| —n | |
| failure of the pumping action of the heart, resulting in loss of consciousness and absence of pulse and breathing: a medical emergency requiring immediate resuscitative treatment | |
cardiac arrest n.
Abbr. CA A sudden cessation of cardiac function, resulting in loss of effective circulation.