副ふく鼻び腔くうMeaningsNoun1. paranasal sinus; paranasal cavity; sinus paranasales (ふくびくう is used by medical professionals)Other readings副ふく鼻び腔こうKanji used副secondary鼻nose腔body cavityComposed of副ふくassistant; associate; vice-; sub-; deputy; substitute; auxiliary; supplementary; additional; collateral; …Noun鼻び腔くうnasal cavityNoun