Metathesis - Dictionary Definition and Overview

Metathesis :  (noun)
1: a linguistic process of transposition of sounds or syllables within a word or words within a sentence
2: a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB_CD=AD_CB) [syn: double decomposition, double decomposition reaction]

Based on WordNet 2.0

Metathesis : \Me*tath"e*sis\, n.; pl. Metatheses. [L., fr. Gr. meta`thesis, fr. metatithe`nai to place differently, to transpose; meta` beyond, over _ tithe`nai to place, set. See Thesis.] 1. (Gram.) Transposition, as of the letters or syllables of a word; as, pistris for pristis; meagre for meager.

2. (Med.) A mere change in place of a morbid substance, without removal from the body.

3. (Chem.) The act, process, or result of exchange, substitution, or replacement of atoms and radicals; thus, by metathesis an acid gives up all or part of its hydrogen, takes on an equivalent amount of a metal or base, and forms a salt.

Based on WordNet (r) 2.0 (August 2003)
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