| 单词 | disc |
| 释义 | disc n. (also disk esp. US and in sense 4) 1. a a flat thin circular object. b a round flat or apparently flat surface (the sun's disc). c a mark of this shape. 2. a layer of cartilage between vertebrae. 3. a gramophone record. 4. a (usu. disk; in full magnetic disk) a computer storage device consisting of several flat circular magnetically coated plates formed into a rotatable disc. b (in full optical disc) a smooth non-magnetic disc with large storage capacity for data recorded and read by laser. 5. a device with a pointer or rotating disc indicating time of arrival or latest permitted time of departure, for display in a parked motor vehicle. Phrases and idioms disc brake a brake employing the friction of pads against a disc. disk drive Computing a mechanism for rotating a disk and reading or writing data from or to it. disc harrow a harrow with cutting edges consisting of a row of concave discs set at an oblique angle. disc jockey the presenter of a selection of gramophone records of popular music, esp. in a broadcast. Etymology: F disque or L discus: see DISCUS |
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