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Meaning of naphthyl group

naph'thyl group"

Pronunciation: [key]
— Chem. Chem.
  1. Also calledthe univalent group CH–, having a replaceable hydrogen atom in the first, or alpha, position; 1-naphthyl group.
  2. Also calledthe univalent group CH–, having a replaceable hydrogen atom in the second, or beta, position; 2-naphthyl group. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.