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[muh-tath-uh-sis] /məˈtæθ ə sɪs/

noun, plural metatheses
[muh-tath-uh-seez] /məˈtæθ əˌsiz/ (Show IPA)
the transposition of letters, syllables, or sounds in a word, as in the pronunciation
[kuhmf-ter-buh l] /ˈkʌmf tər bəl/ (Show IPA) for comfortable or
[aks] /æks/ (Show IPA) for ask.
Chemistry. .
noun (pl) -ses (-ˌsiːz)
the transposition of two sounds or letters in a word
(chem) another name for double decomposition

1570s, “transposition of letters in a word;” c.1600, “rhetorical transposition of words,” from Late Latin metathesis, from Greek metathesis “change of position, transposition, change of opinion,” from stem of metatithenai “to transpose,” from meta- “to change” (see meta-) + tithenai “to place, set,” from PIE root *dhe- “to put, to do” (see factitious). Plural is metatheses. Related: Metathetic.

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.


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