/ Dictionary / Index S spike moss: Meaning and Definition of Find definitions for: spike' moss" Pronunciation: [key] any of numerous plants of the genus Selaginella, allied to and resembling the club mosses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spikemoss (Thesaurus) spikelet spikenard Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language