Equine: Pertaining to a horse or pertaining to the equus family.
The “ine” ending is a Latin attributive feature. Equine describes items related to horses. Porcine has to do with pigs. Ovine refers to sheep. Feline refers to cats, and canine describes something related to dogs.
Not far from my town there is an equine hospital. The doctors are not covered by the Affordable Health Care Act. They don’t wear gloves during procedures. Worst of all, they will only accept payment in the form of apples, and carrots.
Equus come from the Latin word for horse: equus.