Century Dictionary and Cyclopedia
- n parvoline Tetramethylpyri-dine, C5HN(CH3)4. Of the several isomeric varieties, the principal one is 2,3,4,5-tetra-methylpyridine, an oil which occurs in coal-tar. Other varieties are made by distilling bituminous shales, heating cinchonine with potash, or by the decay of horse-fiesh or mackerel. They are basic oils which form salts with acids.