from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A tricyclic heterocyclic compound having two pyridine rings fused with a benzene ring; any of its derivatives
from the GNU version of the Collaborative International Dictionary of English
- n. Either of two metameric nitrogenous hydrocarbon bases, C12H8N2, analogous to phenanthridine, but more highly nitrogenized.
from The Century Dictionary and Cyclopedia
- n. A crystalline base, C12H8N2 + 2H2O, made by heating together metaphenylenediamine, metadinitrobenzene, glycerol, and sulphuric acid.
Blend of phenanthrene and quinoline (Wiktionary)