Can cause dizziness and tingling of the fingers and toes and chest pain if continued

• An increased depth and rate of breathing greater than demanded by the body needs

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
hyperventilation \hyperventilation\ n. The act or process of hyperventilating; breathing rapidly and deeply. (Med.) A condition in which alveolar carbon dioxide concentration is markedly lower than normal, usually due to breathing rapidly and deeply.

Wikipedia Word definitions in Wikipedia
Hyperventilation occurs when the rate and quantity of alveolar ventilation of carbon dioxide exceeds the body's production of carbon dioxide. Hyperventilation can be voluntary or involuntary. When alveolar ventilation is excessive, more carbon dioxide will ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1907, from hyper- + ventilation . Earlier as a type of treatment for lung diseases.

WordNet Word definitions in WordNet
n. an increased depth and rate of breathing greater than demanded by the body needs; can cause dizziness and tingling of the fingers and toes and chest pain if continued

Wiktionary Word definitions in Wiktionary
n. (context medicine English) the state of breathing faster or deeper than necessary