any nocturnal sciurine rodent of the subfamily Petauristinae, of Asia and North America. Furry folds of skin between the forelegs and hind legs enable these animals to move by gliding leaps
flying squirrel in American English
US
1.
any of a number of squirrels (esp. genus Glaucomys) with winglike folds of skin attached to the legs and body, which enable them tomake long, gliding leaps