apophyllite: Meaning and Definition of

a•poph•yl•lite

Pronunciation: (u-pof'u-līt", ap"u-fil'īt), [key]
— n.
  1. a hydrous potassium and calcium silicate mineral occurring in white crystals.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.