/ Dictionary / Index P pectolite: Meaning and Definition of Find definitions for: pec•to•lite Pronunciation: (pek'tu-līt"), [key] — n. a mineral, hydrous calcium sodium silicate, usually occurring in radiating groups of crystals in rock cavities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pectize pectoral Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language