|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|the offspring of a zebra and a donkey.|
tool, usually hand-operated, for turning screws with slotted heads. For screws with one straight diametral slot cut across the head, standard screwdrivers with flat blade tips and in a variety of sizes are used. Special screws with cross-shaped slots in their heads require a special screwdriver with a blade tip that fits the slots. The most common special screw is the Phillips head (Phillips Screw) as shown in the
Learn more about screwdriver with a free trial on Britannica.com.