oligopnea
hy·pop·ne·a
(hī-pop'nē-ă), In the diphthong pn, the p is silent only at the beginning of a word. Although hypopne'a is the correct pronunciation, the alternative pronunciation hypop'nea is widespread in the U.S.hy·pop·ne·a
(hī-pop'nē-ă)Synonym(s): oligopnea, hypopnoea.