ethmoidectomy

noun
eth·​moid·​ec·​to·​my | \ ˌeth-ˌmȯi-ˈdek-tə-mē How to pronounce ethmoidectomy (audio) \
plural ethmoidectomies

Medical Definition of ethmoidectomy

: excision of all or some of the ethmoidal air cells or part of the ethmoid bone