vertigo

noun

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