DCHP-1 Online
marsh rat 
an aquatic rodent, Ondatra zibethica, common to many parts of North America and widely trapped for its valuable fur.
See also: mushrat (def. 1) muskrat (def. 1)
- 1902 (1912) The owl is flapping blindly through the flags to another hiding-place, while the wriggle-wriggle of the waters tells where the marsh-rat has darted away under the tangled growth.
- 1902 (1912) The owl is flapping blindly through the flags to another hiding-place, while the wriggle-wriggle of the waters tells where the marsh-rat has darted away under the tangled growth.