The story
From fronto- + ethmoidectomy.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A surgical procedure involving the removal of diseased tissue and/or bone from the frontal and ethmoid sinuses, typically performed to treat chronic sinus disease, obstruction, infection, or complications of sinusitis. Full definition →
From fronto- + ethmoidectomy.
Etymology from Wiktionary, CC BY-SA 4.0.