(mechanical engineering) In an engine, the power measured in horse power delivered to a rotating shaft, which could be in a turbine, or transmission.

(aviation) In a turboprop engine, the power measured in horse power equivalent to that delivered to a propeller shaft.

plural of horizontal polka

Alternative form of horn of plenty

The angle of the horizon below the level of the eye.

a relatively small but very strong horse breed from the mountainous regions of western Norway.

Any of several viral diseases of horses

The sidewinder, Crotalus cerastes

(dated) The hornbill (Bucerotidae)

Synonym of horned viper (Cerastes cornutus)