naphth-

combining form

variants or naphtho- or less commonly naphtha-

1

: naphtha

naphthene

naphthyl

2

a

: related to naphthalene : naphthoic acid

naphthoquinone

naphthamide

—sometimes in names of compounds in which a benzene nucleus has been replaced by a naphthalene nucleus

naphthoresorcinol C₁₀H₆(OH)₂

b

: naphthol

naphthoxide

3

a

: containing a naphthalene nucleus fused on one or two sides to one or two other rings

naphthacridine

naphthopyran

naphthadiazine

b

: benz- sense 2

—not used systematically

naphthanthracene

Word History

Etymology

International Scientific Vocabulary, from naphtha & naphthaline

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