from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A base of the pyridine group, found in coal tar.
- n. Any of the series of isometric substances of which parvoline is the type.
from the GNU version of the Collaborative International Dictionary of English
- n. A liquid base, C9H13N, of the pyridine group, found in coal tar; also, any one of the series of isomeric substances of which it is the type.
from The Century Dictionary and Cyclopedia
- n. 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.
Sorry, no etymologies found.