Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of phenanthridine is as below...

Phenanthroline :: Phenanthroline (n.) Either of two metameric nitrogenous hydrocarbon bases, C12H8N2, analogous to phenanthridine, but more highly nitrogenized..

Phenanthridine :: Phenanthridine (n.) A nitrogenous hydrocarbon base, C13H9N, analogous to phenanthrene and quinoline..

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