optical disc
Học thuậtThân thiện
Definition
Noun: A flat, circular data storage medium that uses laser light to read and write digital information encoded as microscopic pits on a reflective surface. It is a physical format for storing data such as audio, video, software, and computer files.
Usage
The term "optical disc" refers to the physical object and the technology category. It is often used in technical, commercial, and general contexts when discussing data storage media. - It functions as a common noun. - It is typically modified by adjectives specifying its type (e.g., recordable optical disc, blank optical disc).
Examples
- General Use:
- I backed up my photos onto an optical disc for safekeeping.
- The software is distributed on an optical disc.
- Technical/Descriptive Use:
- An optical disc is read by a laser diode in the drive.
- The data density of a modern optical disc is very high.
Advanced Usage
- As a category term: "Optical disc" serves as the umbrella term for formats like CDs, DVDs, and Blu-ray discs.
- Blu-ray is a type of high-definition optical disc.
- In compound nouns (as a modifier): It can be used adjectivally to describe related technology.
- The computer has an optical disc drive. (Note: Here, "optical disc" modifies "drive"; the target phrase itself is not a compound.)
Variants and Related Words
- Optical disk: An alternative spelling, though "disc" is more common for commercial media (e.g., Compact Disc).
- Related Specific Formats:
- CD (Compact Disc): A type of optical disc for audio and data.
- DVD (Digital Versatile Disc): A higher-capacity optical disc format.
- Blu-ray Disc: A high-definition optical disc format.
Synonyms
- Laser disc (specifically for an older analog video format, but sometimes used generically).
- Disc (in context, as a shortened form).
- Storage disc.
Related Phrases
- Optical disc drive (ODD): The hardware device used to read from and write to optical discs.
- Optical storage: The broader technology of using light to store and retrieve data.
Noun
- a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface