indole
/ˈɪndəʊl/noun
mass noun
1- Chemistry a crystalline organic compound with an unpleasant odour, present in coal tar and in faeces【化】吲哚。
1.1
- A heteroaromatic compound with fused benzene and pyrrole rings; chem. formula: C8H7N.带骈苯和吡咯环的芳香杂环化合物, 化学分子式：C8H7N.
词源
mid 19th cent.: blend of indigo (because obtained artificially from indigo blue) and Latin oleum 'oil'.