/ Dictionary / Index A arthrospore: Meaning and Definition of Find definitions for: ar•thro•spore Pronunciation: (är'thru-spôr", -spōr"), [key] — n. Biol. an isolated vegetative cell that has passed into a resting state, occurring in bacteria and not regarded as a true spore. one of a number of spores of various fungi and certain blue-green algae, united in the form of a string of beads, formed by fission. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arthrospore (Thesaurus) arthrosis Arthur 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