hyperorthognathous

adjective
hy·​per·​or·​thog·​na·​thous | \ ˌhī-pə-ˌrȯr-ˈthäg-nə-thəs How to pronounce hyperorthognathous (audio) \

Medical Definition of hyperorthognathous

: having a very flat facial profile with a facial angle of 93 degrees or above