metathesis
noun
me·tath·e·sis
mə-ˈta-thə-səs
plural metatheses
mə-ˈta-thə-ˌsēz
: a change of place or condition: such as
a
: transposition of two phonemes in a word (as in the development of crud from curd or the pronunciation \ˈpər-tē\ for pretty)
b
: a chemical reaction in which different kinds of molecules exchange parts to form other kinds of molecules
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Merriam-Webster unabridged
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