(môs, mos) noun
1. A delicate, bryophytic plant (class Musci), growing on the ground, decaying wood, rocks, trees, etc., having a stem and distinct leaves, and producing capsules which open by an operculum and contain spores unmixed with elaters.
2. Any of several other cryptogamous plants, as certain lichens, clubmosses, etc.
—v.t. To cover with moss. [<MOSS²]
—moss′y adjective
—moss′i·ness noun

(môs, mos) noun
A bog; peat bog. [OE mos]