dissimilation

[dih-sim-uh-ley-shuh n]
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noun
  1. the act of making or becoming unlike.
  2. Phonetics. the process by which a speech sound becomes different from or less like a neighboring sound, as pilgrim [pil-grim] /ˈpɪl grɪm/ from Latin peregrīnus [per-e-gree-noo s] /ˌpɛr ɛˈgri nʊs/, and purple [pur-puh l] /ˈpɜr pəl/ from Old English purpure [poor-poo-re] /ˈpʊər pʊ rɛ/, or disappears entirely because of a like sound in another syllable, as in the pronunciation [guhv-uh-ner] /ˈgʌv ə nər/ for governor.Compare assimilation(def 7).
  3. Biology. catabolism.

Origin of dissimilation

First recorded in 1820–30; dis-1 + (as)similation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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Historical Examples of dissimilation


British Dictionary definitions for dissimilation

dissimilation

noun
  1. the act or an instance of making dissimilar
  2. phonetics the alteration or omission of a consonant as a result of being dissimilated
  3. biology a less common word for catabolism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for dissimilation
n.

1874, noun of action from dissimilate.

Online Etymology Dictionary, © 2010 Douglas Harper