noun
muskrat
Refers to the muskrat (Ondatra zibethicus), a semiaquatic rodent known for its musky odor.
See also: マスクラット
ニオイネズミは北アメリカ原産のげっ歯類です。
The muskrat is a rodent native to North America.
マスクラット is a direct loanword from English 'muskrat', while ニオイネズミ is a Japanese calque meaning 'smell mouse'.
Compound of 匂い (nioi, 'smell, odor') and 鼠 (nezumi, 'mouse, rat'), referring to the animal's musky scent.