Mule and Donkey Definitions

From Mules and More magazine

DONKEY – Nickname for members of the ass family (Equus asinus)

JACK, JACKASS, Jack Ass – The male of the ass family

JENNET or JENNY – Female of the ass family

BURRO – Small members of the ass family from Mexican and Spanish stock, native to the Southwest, but not widespread

MAMMOTH JACK/JENNET – Large members (measuring 14 hands or more) of the ass family used for draft mule production

MULE – A cross between a male ass (jack) and a female horse (mare)

HINNY – A cross between a male horse (stallion) and a female donkey