water frog
noun
Any frog that lives in water; (in later use) especially any of a group of European green frogs that includes the marsh frog Rana ridibunda and the pool frog R. lessonae and hybrids between these, including the edible frog (formerly known as R. esculenta).
- Rana ridibunda and R. lessonae are now often included in the genus Pelophylax..
Origin
Old English; earliest use found in Chrodegang of Metz's Regula Canonicorum.