marsh hen is a noun meaning "a coot found in North America". It carries 2 recorded senses.
a coot found in North America
any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens
Definitions, synonyms and semantic relations for marsh hen come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.