The dromedary ( or ), also called the Arabian camel (Camelus dromedarius), is a large, even-toed ungulate with one hump on its back. Greek philosopher Aristotle (4th century BCE) was the first to describe the species, and was given its current binomial name by Carl Linnaeus, a Swedish zoologist. The dromedary is the largest camel after the Bactrian camel. Adult male dromedaries stand at the shoulder, while females are tall. The weight typically ranges from in males and in females. The distinctive features of this camel are its long curved neck, narrow chest and only one hump (compared to the two on the Bactrian camel), thick double-layered eyelashes and bushy eyebrows.The coat is generally a shade of brown, but can range from black to nearly white.The hump, which can be tall or more, is made up of fat bound together by fibrous tissue.