|—n , pl -ses|
|1.||the transposition of two sounds or letters in a word|
|2.||chem another name for double decomposition|
|[C16: from Late Latin, from Greek, from metatithenai to transpose]|
metathesis me·tath·e·sis (mĭ-tāth'ĭ-sĭs)
n. pl. me·tath·e·ses (-sēz')
Double decomposition of chemical compounds in which an element or radical of one compound exchanges places with another element or radical in another compound.