/ Dictionary / Index P pot arch: Meaning and Definition of Find definitions for: pot' arch" Pronunciation: [key] — Ceram. Ceram. an auxiliary furnace in which pots used in melting frit are preheated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potamoplankton potash Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language