compression

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English

Etymology

Borrowed from Middle French compression, from Latin compressiō.

Pronunciation

Noun

compression (countable and uncountable, plural compressions)

  1. An increase in density; the act of compressing, or the state of being compressed; compaction.
  2. (automotive) The cycle of an internal combustion engine during which the fuel and air mixture is compressed.
  3. (computing) The process by which data is compressed.
    • 2011, Marcelo A. Montemurro, Damián H. Zanette, “Universal Entropy of Word Ordering Across Linguistic Families”, in PLoS ONE‎, retrieved 2012-09-26:
      Due to the presence of long-range correlations in language , it is not possible to compute accurate measures of the entropy by estimating block probabilities directly. More efficient nonparametric methods that work even in the presence of long-range correlations are based on the property that the entropy of a sequence is a lower bound to any lossless compressed version of it . Thus, in principle, it is possible to estimate the entropy of a sequence by finding its length after being compressed by an optimal algorithm. In our analysis, we used an efficient entropy estimator derived from the Lempel-Ziv compression algorithm that converges to the entropy , , , and shows a robust performance when applied to correlated sequences (see Materials and Methods).
  4. (music) The electronic process by which any sound's gain is automatically controlled.
  5. (astronomy) The deviation of a heavenly body from a spherical form.

Antonyms

Derived terms

Translations

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References

French

Etymology

First known attestation 1314, borrowed from Latin compressiōnem.

Pronunciation

Noun

compression f (plural compressions)

  1. compression (act, instance of compressing)
  2. compression (cycle of an internal combustion engine)

Further reading

Middle French

Etymology

Old French, borrowed from Latin compressiō.

Noun

compression f (plural compressions)

  1. compression (act, instance of compressing)
    • 1585, Giovanni Marinelli, Thresor des remedes secrets pour les maladies des femmes, page 761:
      compression du ventre
      compression of the abdomen

Old French

Etymology

First known attestation 1314, borrowed from Latin compressiō.

Noun

compression oblique singular, f (oblique plural compressions, nominative singular compression, nominative plural compressions)

  1. compression (act, instance of compressing)
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