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单词 molecule
释义

Definition of molecule in English:

molecule

noun ˈmɒlɪkjuːlˈmɑləˌkjul
Chemistry
  • A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

    Example sentencesExamples
    • The reactant ions have enough energy to ionise the molecules of interest but not enough to break them up.
    • This electricity splits the water molecules in an electrolyte, producing hydrogen.
    • In the water molecule there are three atoms: two of hydrogen and one of oxygen.
    • It works by affecting a molecule called nitric oxide, which expands blood vessels.
    • At the root of sunburn are damaging molecules, free radicals that increase when the skin gets too much sun.
    Synonyms
    particle, bit, little bit, tiny bit, tiny piece, fragment, fraction, grain, granule, crumb, morsel, mite, mote, speck, spot, dot

Origin

Late 18th century: from French molécule, from modern Latin molecula, diminutive of Latin moles 'mass'.

 
 

Definition of molecule in US English:

molecule

nounˈmɑləˌkjulˈmäləˌkyo͞ol
Chemistry
  • A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

    Example sentencesExamples
    • The reactant ions have enough energy to ionise the molecules of interest but not enough to break them up.
    • At the root of sunburn are damaging molecules, free radicals that increase when the skin gets too much sun.
    • This electricity splits the water molecules in an electrolyte, producing hydrogen.
    • It works by affecting a molecule called nitric oxide, which expands blood vessels.
    • In the water molecule there are three atoms: two of hydrogen and one of oxygen.
    Synonyms
    particle, bit, little bit, tiny bit, tiny piece, fragment, fraction, grain, granule, crumb, morsel, mite, mote, speck, spot, dot

Origin

Late 18th century: from French molécule, from modern Latin molecula, diminutive of Latin moles ‘mass’.

 
 
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更新时间:2024/12/24 9:22:35