tachypneaEnglishOxford New American Dictionarytachypnea /ˌtakə(p)ˈnēə, ˌtækə(p)ˈniə / (British tachypnoea) ▸ noun Medicine abnormally rapid breathing. – ORIGIN late 19th century : from tachy- ‘swift’ + Greek pnoē ‘breathing’.