Mid 19th century; earliest use found in Anne Pratt (1806–1893), botanist. After scientific Latin urbanum, specific epithet of the wood avens, specific use of neuter singular nominative of classical Latin urbanus.
Definition of city avens in US English:
city avens
noun
rare
The wood avens or herb bennet, Geum urbanum.
Origin
Mid 19th century; earliest use found in Anne Pratt (1806–1893), botanist. After scientific Latin urbanum, specific epithet of the wood avens, specific use of neuter singular nominative of classical Latin urbanus.