horse

(hôrs)

a. A large hoofed mammal (Equus caballus) having a short coat, a long mane, and a long tail, domesticated since ancient times and used for riding and for drawing or carrying loads.

b. An adult male horse; a stallion.

c. Any of various equine mammals, such as the wild Asian species Przewalski's horse or certain extinct forms related ancestrally to the modern horse.

v.intr.

To be in heat. Used of a mare.

adj.

1. Of or relating to a horse: a horse blanket.

2. Mounted on horses: horse guards.

3. Drawn or operated by a horse.

Drug slang A regional term for heroin
Infectious disease A hoofed ungulate mammal—Equus ferus caballus—that may be associated with certain infections through occupational or recreational exposure—e.g., Actinobacillus spp, anthrax, brucellosis, cryptosporidiosis, equine morbillivirus, glanders, leptospirosis, rabies, salmonellosis, yersiniosis
Psychology See Equestrian therapy, Hippotherapy

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References in periodicals archive

This animal was larger than Eohippus. Its teeth had further evolved.

Chapter 1 History and development of the horse

If standard biology is adequate to show that breast implants don't cause autoimmune diseases, why is it useless to help us decide if eohippus is the ancestor of the modern horse?

Weirding Out on Creationism

Fossil horses from "Eohippus" (Hyracotherium) to Equus: scaling, Cope's law, and the evolution of body size.

Stabilizing selection and the comparative analysis of adaptation

And the evolution of the horse, from tiny Eohippus to the modern horse, is often cited as the classic example of Cope's Rule.

Things don't always become bigger

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