Medical Definition of sphagnum
1: any of an order (Sphagnales, containing a single genus Sphagnum) of atypical mosses that grow only in wet acid areas where their remains become compacted with other plant debris to form peat
2: a mass of dehydrated sphagnum plants used as a surgical dressing especially during World War I
Learn More about sphagnum
Dictionary: Definition of "sphagnum"
Seen and Heard
What made you want to look up sphagnum? Please tell us where you read or heard it (including the quote, if possible).