metathesis

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me·tath·e·sis / məˈta[unvoicedth]əsəs/ • n. (pl. -ses / -ˌsēz/ ) 1. Gram. the transposition of sounds or letters in a word. 2. (also me·tath·e·sis re·ac·tion) Chem. a reaction in which two compounds exchange ions, typically with precipitation of an insoluble product. Also called double decomposition. DERIVATIVES: met·a·thet·ic / ˌmetəˈ[unvoicedth]etik/ adj. met·a·thet·i·cal / ˌmetə[unvoicedth]etikəl/ adj.

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metathesisglacis, Onassis •abscess •anaphylaxis, axis, praxis, taxis •Chalcis • Jancis • synapsis • catharsis •Frances, Francis •thesis • Alexis • amanuensis •prolepsis, sepsis, syllepsis •basis, oasis, stasis •amniocentesis, anamnesis, ascesis, catechesis, exegesis, mimesis, prosthesis, psychokinesis, telekinesis •ellipsis, paralipsis •Lachesis •analysis, catalysis, dialysis, paralysis, psychoanalysis •electrolysis • nemesis •genesis, parthenogenesis, pathogenesis •diaeresis (US dieresis) • metathesis •parenthesis •photosynthesis, synthesis •hypothesis, prothesis •crisis, Isis •proboscis • synopsis •apotheosis, chlorosis, cirrhosis, diagnosis, halitosis, hypnosis, kenosis, meiosis, metempsychosis, misdiagnosis, mononucleosis, myxomatosis, necrosis, neurosis, osmosis, osteoporosis, prognosis, psittacosis, psychosis, sclerosis, symbiosis, thrombosis, toxoplasmosis, trichinosis, tuberculosis •archdiocese, diocese, elephantiasis, psoriasis •anabasis • apodosis •emphasis, underemphasis •anamorphosis, metamorphosis •periphrasis • entasis • protasis •hypostasis, iconostasis

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METATHESIS [Stress: ‘me-TA-the-sis’]. The transposition of elements of language, usually two sounds and/or letters in a word: Old English bridd becoming Modern English bird, Middle English Manisk becoming Modern English Manx. Non-standard aks in Don't aks me metathesizes standard ask. Compare SLIP OF THE TONGUE, SPOONERISM.

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metathesis XVII. — late L. — Gr. metáthesis, f. metatithénai transpose; see META-, THESIS.
So metathetic XIX.