Definition of naphthyl in English:

naphthyl

(also naphtyl)

Pronunciation /ˈnafθʌɪl/ /ˈnapθʌɪl/ /ˈnafθ(ɪ)l/

noun

Chemistry
  • Either of two isomeric monovalent radicals, C₁₀ H₇ —, derived from naphthalene. Usually attributive or as a formative in chemical names.

Origin

Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From naphth- + -yl.