- The plant bloodroot, Sanguinaria canadensis.
- Rumex sanguineus, the bloody-veined dock.
- Any of the Haemodoraceae, a family of flowering plants some of whose roots contain a red dye.
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.