vertigo

noun4

1. •
   A sensation of whirling and loss of balance, caused by looking down from a great height or by disease affecting the inner ear.
2. •
   A disordered or imbalanced state of mind or things analogous to physical vertigo; mental giddiness or dizziness.
3. •
   The act of whirling round and round; rapid rotation.
4. •
   A snail of the genus Vertigo.