Contraction vs Compression - What's the difference?

contraction | compression |


As nouns the difference between contraction and compression

is that contraction is a reversible reduction in size while compression is an increase in density; the act of compressing, or the state of being compressed; compaction.

contraction

English

Noun

(en-noun)
  • A reversible reduction in size.
  • (economics) A period of economic decline or negative growth.
  • The country's economic contraction was caused by high oil prices.
  • (biology) A shortening of a muscle when it is used.
  • (medicine) A strong and often painful shortening of the uterine muscles prior to or during childbirth.
  • (linguistics) A process whereby one or more sounds of a free morpheme (a word) are lost or reduced, such that it becomes a bound morpheme (a clitic) that attaches phonologically to an adjacent word.
  • In English ''didn't'', ''that's'', and ''wanna'', the endings ''-n't'', ''-'s'', and ''-a'' arose by contraction .
  • (English orthography) A word with omitted letters replaced by an apostrophe, usually resulting from the above process.
  • "Don't" is a contraction of "do not."
  • (medicine) Contracting a disease.
  • The contraction of AIDS from toilet seats is extremely rare.
  • (phonetics) Syncope, the loss of sounds from within a word.
  • The acquisition of something, generally negative.
  • Our contraction of debt in this quarter has reduced our ability to attract investors.
  • (medicine) A distinct stage of wound healing, wherein the wound edges are gradually pulled together.
  • Antonyms

    * expansion * dilatation

    Derived terms

    * contractional * contractionary * hypercontraction * supercontraction

    See also

    * omission * *

    compression

    English

    Noun

    (en-noun)
  • an increase in density; the act of compressing, or the state of being compressed; compaction
  • the cycle of an internal combustion engine during which the fuel and air mixture is compressed
  • (computing) the process by which data is compressed
  • * {{quote-web
  • , year = 2011 , author = Marcelo A. Montemurro & Dami├ín H. Zanette , title = Universal Entropy of Word Ordering Across Linguistic Families , site = PLoS ONE , url = http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0019875 , accessdate = 2012-09-26}}
    Due to the presence of long-range correlations in language [21], [22] 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 [15]. 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 [19], [23], [24], and shows a robust performance when applied to correlated sequences [25] (see Materials and Methods).
  • (music) the electronic process by which any sound's gain is automatically controlled
  • (astronomy) the deviation of a heavenly body from a spherical form
  • Derived terms

    * compression ratio * compression wave * data compression

    Antonyms

    * decompression * rarefaction

    References

    *