The Collaborative International Dictionary of English v.0.48:
Moss \Moss\ (m[o^]s; 115), n. [OE. mos; akin to AS. me['o]s, D.
mos, G. moos, OHG. mos, mios, Icel. mosi, Dan. mos, Sw.
mossa, Russ. mokh', L. muscus. Cf. Muscoid.]
1. (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.
Note: The term moss is also popularly applied to many other
small cryptogamic plants, particularly lichens, species
of which are called tree moss, rock moss, coral moss,
etc. Fir moss and club moss are of the genus
Lycopodium. See Club moss, under Club, and
2. A bog; a morass; a place containing peat; as, the mosses
of the Scottish border.
Note: Moss is used with participles in the composition of
words which need no special explanation; as,
moss-capped, moss-clad, moss-covered, moss-grown, etc.
Black moss. See under Black, and Tillandsia.
Bog moss. See Sphagnum.
Feather moss, any moss branched in a feathery manner, esp.
several species of the genus Hypnum.
Florida moss, Long moss, or Spanish moss. See
Iceland moss, a lichen. See Iceland Moss.
Irish moss, a seaweed. See Carrageen.
Moss agate (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.
Moss animal (Zool.), a bryozoan.
Moss berry (Bot.), the small cranberry (Vaccinium
Moss campion (Bot.), a kind of mosslike catchfly (Silene
acaulis), with mostly purplish flowers, found on the
highest mountains of Europe and America, and within the
Moss land, 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.
Moss pink (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. --Gray.
Moss rose (Bot.), a variety of rose having a mosslike
growth on the stalk and calyx. It is said to be derived
from the Provence rose.
Moss rush (Bot.), a rush of the genus Juncus (Juncus
Scale moss. See Hepatica.