squareflipper square flipper squa·ref·lip·persquareflipper uncommon noun 1. medium-sized grayish to yellow seal with bristles each side of muzzle; of Arctic Ocean Synonymsbearded sealsquareflipper square flipperErignathus barbatus Related words Broader terms earless seal Parts Erignathus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.