Metathesis may refer to:

Changes of vocal properties

Metathesis (linguistics) Metathesis (; from Greek , from "I put in a different order"; Latin: ''transpositio'') is the transposition of sounds or syllables in a word or of words in a sentence. Most commonly, it refers to the interchange of two or more contiguous segm ...

, alteration of the order of phonemes within a word * Quantitative metathesis, exchange of long and short roles, without changing order of vowel sounds

Chemical change in which a pair of molecules exchange electronic patterns of bonding

Salt metathesis reaction A salt metathesis reaction, sometimes called a double displacement reaction, is a chemical process involving the exchange of bonds between two reacting chemical species which results in the creation of products with similar or identical bonding a ...

, exchange of bonds between two reacting chemical species *

Olefin metathesis Olefin metathesis is an organic reaction that entails the redistribution of fragments of alkenes (olefins) by the scission and regeneration of carbon-carbon double bonds. Because of the relative simplicity of olefin metathesis, it often create ...

, redistribution of olefinic (alkene) chemical bonds * Alkane metathesis, redistribution of alkane chemical bonds *

Alkyne metathesis Alkyne metathesis is an organic reaction that entails the redistribution of alkyne chemical bonds. The reaction requires metal catalysts. Mechanistic studies show that the conversion proceeds via the intermediacy of metal alkylidyne complexes. T ...

, redistribution of alkyne chemical bonds {{dab