balloon, sinus

balloon, sinus,

n a hollow rubber structure expandable with liquid or air that is used to support depressed fractures of the walls of the maxillary sinus.
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Michaelmas was come, with its fragrant basketfuls of purple damsons, and its paler purple daisies, and its lads and lasses leaving or seeking service and winding along between the yellow hedges, with their bundles under their arms.