Wiktionary
spike moss
alt. Any of various simple vascular plants, of the family Selaginellaceae, that resemble mosses and produce spores. n. Any of various simple vascular plants, of the family Selaginellaceae, that resemble mosses and produce spores.
WordNet
spike moss
n. any of numerous fern allies of the genus Selaginella [syn: spikemoss, little club moss]