Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Of, relating to, or derived from naphthalene.
  • adjective Relating to phthalic acid.

from The Century Dictionary.

  • Derived from naphthalene.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Chem.) Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances.
  • adjective (Chem.) a white crystalline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective chemistry of, relating to, or derived from naphthalene or phthalic acid

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Short for naphthalic acid : naphthal(ene) + –ic.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Shortened form of naphthalic, from naphthalene + -ic, from naphtha + -ene

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