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Shortened form of naphthalic, from naphthalene + -ic, from naphtha + -al + -ene.
Etymology from Wiktionary, CC BY-SA 4.0.
phthalic
Today it means: Of, relating to, or derived from naphthalene or phthalic acid. Full definition →
Today it means: Of, relating to, or derived from naphthalene or phthalic acid. Full definition →
Shortened form of naphthalic, from naphthalene + -ic, from naphtha + -al + -ene.
Etymology from Wiktionary, CC BY-SA 4.0.