noun[mass noun] Chemistry
- A pungent oily liquid present in coal tar.
More example sentences
- A heteroaromatic compound with fused benzene and pyridine rings; chemical formula: C9H7N
- The most important chemical classes of these so-called auxin herbicides include chlorophenoxy acids, benzoic acids, pyridines, and quinoline carboxylic acids.
More definitions of quinolineDefinition of quinoline in:
- The US English dictionary