sidesaddle

Noun

 * 1) A saddle, usually for a woman, in which the rider sits with both legs on the same side of the horse.
 * 2) The technique of riding a horse with both legs on the same side of the horse.

Adverb



 * On, or as if on, such a saddle.
 * He rode sidesaddle to avoid worsening his injured leg.
 * He had his daughter riding sidesaddle on the bicycle frame while he pedaled.