exercise ball
noun
a firm, very large, usually inflatable ball used in various exercises, chiefly to strengthen the back, pelvis, and abdominal muscles.
Nearby words
exenteritis, exequatur, exequies, exequy, exercise, exercise ball, exercise bicycle, exercise bike, exercise book, exercise machine, exercise physiology
Also called stability ball, balance ball, fitness ball.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019