The definition of a biennium is a period of two years. Your two-year cell phone contract is an example of a biennium. noun.
Symptoms of vestibular neuritis are characterised by a sudden onset of a constant, intense spinning sensation that is usually disabling and requires bed rest. It is often associated with nausea, vomiting, unsteadiness, imbalance, difficulty with vision and the inability to concentrate.
Hearing is unaffected. Labyrinthitis is a similar syndrome to vestibular neuritis, but with the addition of hearing symptoms (sensory type hearing loss or tinnitus). The symptoms of both vestibular neuritis and labyrinthitis typically include dizziness or vertigo, disequilibrium or imbalance, and nausea.