brown rat(n = noun.animal) norway rat, rattus norvegicus - common domestic rat; serious pest worldwide; Array
is a kind of rat
is a member of genus rattus, rattus
has particulars: wharf rat, sewer rat

alaskan brown bear, bandicoot rat, beaver rat, big brown bat, black rat, black rat snake, boston brown bread, brown, brown algae, brown ash, brown bat, brown bear, brown bells, brown bent, brown betty, brown bill, brown bread, brown bullhead, brown butter, brown coal, brown creeper, brown cup, brown hickory, brown hyena, brown lacewing, brown lemming, brown nose, brown oak, brown onion sauce, brown pine, brown race, brown rice, brown root rot fungus, brown rot, brown rot gummosis, brown sauce, brown snail, brown soft scale, brown study, brown sugar, brown swiss, brown thrasher, brown thrush, brown trout, brown university, caramel brown, cassel brown, cat and rat, chinchilla rat, chinese brown sauce, cotton rat, damaraland mole rat, deep brown, desert rat, dusky-footed wood rat, dwarf pocket rat, european brown bat, father brown, florida water rat, grayish brown, greyish brown, gym rat, indian rat snake, jerboa rat, john brown, kangaroo rat, light brown, little brown bat, little brown myotis, lyman frank brown, marsupial rat, mole rat, naked mole rat, norway rat, olive brown, opossum rat, ord kangaroo rat, pack rat, pocket rat, pouched rat, queen mole rat, rat, rat cheese, rat chinchilla, rat kangaroo, rat race, rat snake, rat terrier, rat typhus, red rat snake, reddish brown, rice rat, robert brown, roof rat, sand rat, sea rat, sewer rat, trade rat, vandyke brown, water rat, wharf rat, wood rat, yellowish brown