megabyte

(redirected from M-byte)
Also found in: Thesaurus, Medical, Encyclopedia.

meg·a·byte

 (mĕg′ə-bīt′)
n. Abbr. MB
1. A unit of computer memory or data storage capacity equal to 1,048,576 (220) bytes.
2. One million bytes. See Usage Note at gigabyte.

megabyte

(ˈmɛɡəˌbaɪt)
n
(Units) computing 220 or 1 048 576 bytes. Abbreviation: MB or mbyte See also mega-2

meg•a•byte

(ˈmɛg əˌbaɪt)

n. Computers.
1. 220 (1,048,576) bytes; 1024 kilobytes.
2. 106, or one million (1,000,000), bytes; 1000 kilobytes. Abbr.: MB
[1965–70]

meg·a·byte

(mĕg′ə-bīt′)
1. A unit of computer memory or data storage capacity equal to 1,024 kilobytes (220 bytes).
2. One million bytes.
Usage Usually the prefix kilo- means "one thousand," and the prefix mega- means "one million." But in the calculation of data storage these prefixes have a different meaning. Data storage capacity (measured in bytes) is based on powers of 2 because of the binary nature of bits (1 byte is 8, or 23, bits). Here, the prefix mega- refers to the power of 2 closest to 1,000,000, which is 220, or 1,048,576. Thus, a megabyte is 1,048,576 bytes, although it is also used less technically to refer to a million bytes. Similarly, the prefix kilo- refers either to 1,000 or to 210 (1,024). Measuring the transmission of data is somewhat different from measuring its storage. Since a bit of transmitted data is considered as one signal pulse rather than an either/or unit, it is natural to count transmitted bits using ordinary numbers instead of the binary system. Thus a megabyte of transmitted data usually refers to a million (not 1,048,576) bits. Other prefixes for greater amounts, such as giga- and tera-, follow similar rules for data storage and transmission.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.megabyte - a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes
MB, M
computer memory unit - a unit for measuring computer memory
kilobyte, kB, K - a unit of information equal to 1000 bytes
gigabyte, GB, G - a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes
2.megabyte - a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytesmegabyte - a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
computer memory unit - a unit for measuring computer memory
KiB, kibibyte, kilobyte, kB, K - a unit of information equal to 1024 bytes
GiB, gibibyte, gigabyte, GB, G - a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
Translations
megabyte

megabyte

[ˈmegəˌbaɪt] N (Comput) → megabyte m, mega m

megabyte

[ˈmɛgəbaɪt] nméga-octet m, mégaoctet m

megabyte

n (Comput) → Megabyte nt; a 40-megabyte memoryein 40-Megabyte-Speicher m

megabyte

[ˈmɛgəˌbaɪt] nmegabyte m inv
References in periodicals archive ?
Available immediately with a 120 M-byte hard drive, 6 Mbytes of memory and a dual-speed high-density floppy drive, the Amiga 4000 is priced at $3,699.