/ Dictionary / Index A archespore: Meaning and Definition of Find definitions for: ar•che•spore Pronunciation: (är'ku-spôr", -spōr"), [key] — n. Bot. the primitive cell, or group of cells, that give rise to the cells from which spores are derived. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: archespore (Thesaurus) Arches National Park archesporium Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language