from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Abnormally deep or rapid breathing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Deep and rapid respiration that occurs normally after exercise or abnormally with fever or various disorders.
hyper- + Greek pnoiā, -pnoia, breath, breathing (from pnein, to breathe).(American Heritage® Dictionary of the English Language, Fourth Edition)
hyper- + -pnea (Wiktionary)