n. Abnormally deep or rapid breathing. [HYPER- + Greek pnoiā, -pnoia, breath, breathing (from pnein, to breathe; see pneu- in the Appendix of Indo-European roots).] hy′perp·neic (-ĭk) adj. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.