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单词 metathesis
释义

Definition of metathesis in English:

metathesis

nounPlural metatheses mɪˈtaθɪsɪsməˈtæθəsəs
  • 1Grammar
    mass noun The transposition of sounds or letters in a word.

    he attributes the metathesis of the last two sounds to the Creole tendency to end words with a vowel
    Example sentencesExamples
    • We are dealing here with a phenomenon called metathesis (pronounced mih-TATH-uh-sis), the switching of two adjacent sounds within a word.
    • It looks like Safire is assuming a metathesis and then a reshaping to match other cular words, which would supply a/y.
    • Stress errors and phoneme substitutions or metatheses not attributable to dialect or articulation, however, were considered incorrect.
    • X sometimes alternates with sk by metathesis: Manx for earlier Mansk; piskey as a variant of pixie; ax as a dialect form of ask.
  • 2Chemistry

    another term for double decomposition
    Example sentencesExamples
    • Recently there has also been a growing interest in utilising what is known as the alkene metathesis reaction for altering chain-lengths of ‘oils’ to form new compounds.
    • I've never done an olefin metathesis reaction, which means that the trend started without me and will leave without me.
    • In South Africa, interest in alkene metathesis research is growing.
    • This was made by metathesis of 1-ethyl - 3-methylimidazolium [emim] with Ag [BF 4] in methanol.
    • The Nobel prize in Chemistry this year goes to Robert H. Grubbs, Richard R. Schrock, and Yves Chauvin (Institut Francais du Petrole) for the development of metathesis.

Derivatives

  • metathetic

  • adjective ˌmɛtəˈθɛtɪkˌmɛdəˈθɛdɪk
    • Sometimes the metathetic version of a word becomes so popular that it replaces the original so-called ‘correct’ pronunciation.
      Example sentencesExamples
      • Here are a few more words that are metathetic forms of former words.
      • There is a great deal of debate as to whether or not stimuli that are part of a metathetic continuum can be explained by the Power Law.
      • The present invention relates to a heterogenic rhenium containing catalyst suited particularly to the metathetic reactions of hydrocarbons.
      • It is suggested here that metathetic continua may not be amenable to investigation as relative class concepts.
  • metathetical

  • adjective mɛtəˈθɛtɪk(ə)l
    • Now it is certainly possible to rig up such a metathetical reaction where the ions change partners and both precipitate!
      Example sentencesExamples
      • The metathetical process to generate isocyanates allows also for facile formation of sterically demanding aryl isocyanide, by a deoxygenation route.
      • Methanol extraction of the as-synthesized nanocrystals from the metathetical reaction of GaCl3 with (Na / K) 3As resulted in surface derivatization of the nanoparticles in which methanol capped GaAs quantum dots were obtained.
      • Furthermore, we have found that the throughput for the process is improved when an ammonium salt is used for the metathetical second step of the process.
      • Both thermal (in solid state) and metathetical polymerization (using WCl6 / tetramethyltin catalyst and chlorobenzene solvent) of bisnadimides was carried out.

Origin

Late 16th century: from Greek, from metatithenai 'transpose, change the position of'.

 
 

Definition of metathesis in US English:

metathesis

nounməˈtæθəsəsməˈtaTHəsəs
  • 1Grammar
    The transposition of sounds or letters in a word.

    he attributes the metathesis of the last two sounds to the Creole tendency to end words with a vowel
    Example sentencesExamples
    • We are dealing here with a phenomenon called metathesis (pronounced mih-TATH-uh-sis), the switching of two adjacent sounds within a word.
    • Stress errors and phoneme substitutions or metatheses not attributable to dialect or articulation, however, were considered incorrect.
    • X sometimes alternates with sk by metathesis: Manx for earlier Mansk; piskey as a variant of pixie; ax as a dialect form of ask.
    • It looks like Safire is assuming a metathesis and then a reshaping to match other cular words, which would supply a/y.
  • 2Chemistry
    A reaction in which two compounds exchange ions, typically with precipitation of an insoluble product.

    Also called double decomposition
    Example sentencesExamples
    • The Nobel prize in Chemistry this year goes to Robert H. Grubbs, Richard R. Schrock, and Yves Chauvin (Institut Francais du Petrole) for the development of metathesis.
    • Recently there has also been a growing interest in utilising what is known as the alkene metathesis reaction for altering chain-lengths of ‘oils’ to form new compounds.
    • I've never done an olefin metathesis reaction, which means that the trend started without me and will leave without me.
    • In South Africa, interest in alkene metathesis research is growing.
    • This was made by metathesis of 1-ethyl - 3-methylimidazolium [emim] with Ag [BF 4] in methanol.

Origin

Late 16th century: from Greek, from metatithenai ‘transpose, change the position of’.

 
 
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更新时间:2025/1/9 21:35:47