Sphagnum (noun)

1. A type of moss that grows in wet, acidic environments, such as bogs and fens.
2. A genus of moss which is commonly found in peat bogs.

Origin:

From the latin word sphagnos, from greek σφάγνος sphagnos, from σφαγή sphagē ("mos.s")

Examples:

1. Sphagnum moss is a vital component of peat bogs and helps to form peat.
2. The sphagnum moss is a major component of the ecosystem of the bog.
3. The sphagnum moss is used in horticulture as a soil amendment and a mulch.
4. Sphagnum moss has been used for centuries to line and waterproof baskets and clothing.
5. Sphagnum moss is an important source of food for insects and birds in wetland ecosystems.