As the professional dancers of medieval times were usually also tumblers or acrobats, the words for dance and tumble were commonly used as synonymous. (Compare hop, dance, hopster, a female dancer, Latin saltator, saltatrix, a dancer, literally 'leaper.') The daughter of Herodias, who danced before Herod, is often pictured in medieval art as tumbling, walking on her hands, or standing on her head. [Century Dictionary]