单词：mercaptans
n. Any one of series of compounds, hydrosulphides of
alcohol radicals, in composition resembling the alcohols, but
containing sulphur in place of oxygen, and hence called also the
sulphur alcohols. In general, they are colorless liquids having a
strong, repulsive, garlic odor. The name is specifically applied to
ethyl mercaptan, C2H5SH. So called from its avidity for mercury, and
other metals.
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