from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A hydrocarbon obtained from coal tar residues, remarkable for its intense yellowish-green fluorescence.

from the GNU version of the Collaborative International Dictionary of English

  • n. A hydrocarbon obtained from coal-tar residues, and remarkable for its intense yellowish green fluorescence.

from The Century Dictionary and Cyclopedia

  • n. A greenish-yellow, highly fluorescent hydrocarbon, possibly isomeric with anthracene, contained in the highest boiling portion of Pennsylvania crude petroleum. It forms small acicular crystals.


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