Wiktionary
proprietorially
adv. In a proprietorial manner; like an owner.
Usage examples of "proprietorially".
She turned to regard her queen fondly as the golden dragon hovered proprietorially over the fifty-one eggs which would, by all the signs, hatch some time this day.
K'vin, coming up behind them, casually laid a hand on his Weyrwoman's shoulder, acting as proprietorially of her as her dragon was of her clutch.