moss

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various green, usually small, nonvascular plants of the division Bryophyta, having leaflike structures arranged around the stem and spores borne in a capsule.
• noun A patch or covering of such plants.
• noun Any of various other unrelated plants having a similar appearance or manner of growth, such as Irish moss, Spanish moss, and the club mosses.
• transitive verb To cover with moss.

from The Century Dictionary.

• noun An erroneous form of morse.
• noun A swamp or bog; specifically, a peatbog or a tract of such bogs; also, peat.
• noun The widow's-cross, Sedum pulchellum.
• noun The haircap-moss, Polytrichum juniperinum.
• noun Same as golden moss .
• noun Same as flowering moss .
• To fill with moss, as the crevices between the logs in a logging-camp.
• noun A small herbaceous plant of the natural order Musci, with simple or branching stems and numerous generally narrow leaves: usually applied to a matted mass of such plants growing together; also, in popular use, any small cryptogamic plant, particularly a lichen: as, Iceland moss, club-moss, rock-moss, coral-moss, etc., and sometimes small matted phanerogams, as Pyxidanthera.
• noun Money: in allusion to the proverb, “a rolling stone gathers no moss.”
• To cover with moss.
• To become mossy; gather moss.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To cover or overgrow with moss.
• noun (Bot.) A cryptogamous plant of a cellular structure, with distinct stem and simple leaves. The fruit is a small capsule usually opening by an apical lid, and so discharging the spores. There are many species, collectively termed Musci, growing on the earth, on rocks, and trunks of trees, etc., and a few in running water.
• noun A bog; a morass; a place containing peat.
• noun See under Black, and Tillandsia.
• noun See Sphagnum.
• noun any moss branched in a feathery manner, esp. several species of the genus Hypnum.
• noun See Tillandsia.
• noun a lichen. See Iceland Moss.
• noun a seaweed. See Carrageen.
• noun (Min.) a variety of agate, containing brown, black, or green mosslike or dendritic markings, due in part to oxide of manganese. Called also Mocha stone.
• noun (Zoöl.) a bryozoan.
• noun (Bot.) the small cranberry (Vaccinium Oxycoccus).
• noun (Bot.) a kind of mosslike catchfly (Silene acaulis), with mostly purplish flowers, found on the highest mountains of Europe and America, and within the Arctic circle.
• noun land produced accumulation of aquatic plants, forming peat bogs of more or less consistency, as the water is grained off or retained in its pores.
• noun (Bot.) a plant of the genus Phlox (Phlox subulata), growing in patches on dry rocky hills in the Middle United States, and often cultivated for its handsome flowers.
• noun (Bot.) a variety of rose having a mosslike growth on the stalk and calyx. It is said to be derived from the Provence rose.
• noun (Bot.) a rush of the genus Juncus (Juncus squarrosus).
• noun See Hepatica.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A bog; a swamp.
• noun Any of various small green plants growing on the ground or on the surfaces of trees, stones etc.; now specifically, a plant of the division Bryophyta (formerly Musci).
• noun countable A type or species of such plant.
• verb intransitive To become covered with moss.
• verb transitive To cover (something) with moss.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun tiny leafy-stemmed flowerless plants