3 in notes

ratcu gismu

x₁ is a rat of species/breed x₂.

See also smacu.

jbovlaste

In notes:

smacu: x₁ is a mouse of species/breed x₂.
marmota: x₁ is a marmot/woodchuck/groundhog of species x₂.
ratmacu: x₁ is a mouse/rat (family Muridae) of species/breed x₂