Definition of molecular weight in English:

molecular weight

Syllabification: mo·lec·u·lar weight


  • The ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12.
    More example sentences
    • Milk protein, or casein, is a mixture of molecules with molecular weights ranging from 75,000 to 375,000 daltons (amu).
    • The ethyl group has a greater molecular weight than the smallest alkyl radical which is the methyl group.
    • Alcohols and ethers having higher molecular weights do not dissolve well in water, however, because the water molecules can not completely surround those molecules.

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Pronunciation: grōˈteskərē
grotesque quality or grotesque things collectively