The Collaborative International Dictionary
Disproportionally
Disproportionally \Dis`pro*por"tion*al*ly\, adv. In a disproportional manner; unsuitably in form, quantity, or value; unequally.
Wiktionary
disproportionally
adv. In a disproportional manner, or to a disproportional extent; disproportionately
Usage examples of "disproportionally".
Its head was disproportionally large, bent forward as if in serene meditation, the brain a gleaming shadow with the cerebrum neatly halved.