Dictionary.com
Thesaurus.com

hypopnoea

British  
/ haɪˈpɒpnɪə, ˌhaɪpəˈniːə /

noun

  1. pathol abnormally shallow breathing, usually accompanied by a decrease in the breathing rate

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of hypopnoea

C20: New Latin, from hypo- + Greek pnoia breath, from pnein to breathe