What is "vestibular apparatus"

Usage examples of "vestibular apparatus".

Now there was nothing, there was not even the opposite pressure of his seatbelt on his stomach, the vestibular apparatus in his middle ear was stubbornly insisting that he was falling, his stomach was floating, twisting, turning, fluid was churning, sloshing, lapping at the base of his esophagus, his stomach muscles were clenching, now slowly, now faster, his mouth began to water, and.