CD

Definition

CD is a noun that refers to a **compact disc**, a digital optical disc storage format commonly used to store audio recordings, data, and software. "CD" can also refer to **certificate of deposit** in banking, a type of savings product.

Parts of Speech

• Noun

Pronunciation

American English

• IPA Pronunciation: /ˌsiːˈdiː/
• Respelling: SEE-DEE

British English

• IPA Pronunciation: /ˌsiːˈdiː/
• Respelling: SEE-DEE

Etymology

The term "CD" is an acronym for "compact disc," developed by Sony and Philips in the late 1970s and commercially released in the early 1980s. The technology was based on principles of optical storage and digital audio.

Derivatives

• CD-ROM (noun)
• CD-R (noun)
• CD-RW (noun)
• Audio CD (noun)
• CD player (noun)

Synonyms

• Disc
• Optical disc
• Compact disc

Antonyms

• None

Usage

The term "CD" is commonly used in music and media for physical digital audio recordings and in banking to refer to a type of time deposit. For example, "She bought her favorite album on CD," or "He invested in a 5-year CD at his bank."

Related Terms

• DVD: A digital optical disc storage format, often used for video.
• Blu-ray: An advanced optical disc storage technology for high-definition video and data.
• Digital audio: A form of digital media used to store sound recordings.

Detailed Definitions

Noun

• A compact disc used for digital storage: Refers to a digital optical disc format for music, data, or software.
  • Example: "The album was released on CD."
• A certificate of deposit in banking: Refers to a fixed-term savings product with a guaranteed interest rate.
  • Example: "She opened a high-yield CD to save for her vacation."