Symmetric meaning

sĭ-mĕt'rĭ-kəl
Relating to a logical or mathematical relation between two elements such that if the first element is related to the second element, the second element is related in like manner to the first. The relation a = b is symmetric, whereas the relation a > b is not.
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Symmetric is something where one side is a mirror image or reflection of the other.

An example of symmetric is when you have two cabinets of exactly the same size and shape on either side of your refrigerator.

noun
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Balanced or proportional.
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In telecommunications, a link that supports equal bandwidth in both directions. Symmetric digital subscriber line (SDSL), for example, supports equal bandwidth downstream and upstream. Bluetooth supports an asynchronous data channel that can operate in symmetric mode at speeds of up to 432.6 kbps. Alternatively, the Bluetooth data channel can operate in asymmetric mode at up to 721 kbps in either direction and 57.6 kbps in the reverse direction. See also asymmetric, asynchronous, bandwidth, Bluetooth, channel, downstream, SDSL, and upstream.
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In compression, a process that is equally time-consuming and processor-intensive in terms of compression and decompression. See also compression.
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adjective
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(set theory) Of a relation R on a set S, such that xRy if and only if yRx for all members x and y of S (that is, if the relation holds between any element and a second, it also holds between the second and the first).

"Is a sibling of" is a symmetric relation.

adjective
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(cryptography) Using the same key (keys that are trivially related) for both encryption and decryption.
adjective
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Relating to or exhibiting symmetry.
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No difference in opposing modes. It typically refers to speed. For example, in symmetric operations, it takes the same time to compress and encrypt data as it does to decompress and decrypt it. Contrast with asymmetric.
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Origin of symmetric

  • From Latin symmetria from Ancient Greek συμμετρία (summetria).
    From Wiktionary