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.
- Any of various green, usually small, nonvascular plants of the class Musci of the division Bryophyta.
- A patch or covering of such plants.
- Any of various other unrelated plants having a similar appearance or manner of growth, such as the club moss, Irish moss, and Spanish moss.
- To cover with moss.