Lophiomys imhausi, a nocturnal, long-haired and bushy-tailed East African rodent that superficially resembles a porcupine.

maned rat

plural of rat-baiting

Alternative form of rathole

Alternative form of lab rat

(idiomatic) A student or employee who spends a great deal of time working in a laboratory.

(derogatory) Somebody deemed too reliant on welfare.

A dark rat once endemic to Christmas Island, Rattus nativitatis, now extinct.

Rattus macleari, a brown rat once endemic to Christmas Island, now extinct.

Alternative spelling of gym-rat