combining form
or naphtho- also naphtha-
Etymology: International Scientific Vocabulary, from naphtha & naphthaline
1. : naphtha
naphth ene
naphth yl
2.
a. : related to naphthalene : naphthoic acid
naphtho quinone
naphth amide
— sometimes in names of compounds in which a benzene nucleus has been replaced by a naphthalene nucleus
naphtho resorcinol C 10 H 6 (OH) 2
b. : naphthol
naphth oxide
3.
a. : containing a naphthalene nucleus fused on one or two sides to one or two other rings
naphth acridine
naphtho pyran
naphtha diazine
b. : benz- 2 — not used systematically
naphth anthracene