noun
hinny
A hinny is the offspring of a male horse and a female donkey. This is a specialized animal term, and the word is usually written in katakana.
See also: ラバ
ケッテイは、雄の馬と雌のロバの間に生まれた雑種です。
A hinny is a hybrid born between a male horse and a female donkey.
ラバ (mule) is the offspring of a male donkey and a female horse, while ケッテイ (hinny) is the reverse cross.
The reading けってい is likely derived from Chinese 駃騠 (juétí), which refers to a hinny or a type of horse. The exact historical derivation is uncertain.