Search the dictionary A Chinese word or character, or English Search 9 entries. kòngxué 空穴 electron hole (physics) kǒngxué 孔穴 aperture kòngxuéláifēngwèibìwúyīn 空穴来风未必无因 wind does not come from an empty cave without reason kòngxuéláifēngwèibìwúyīn 空穴來風未必無因 wind does not come from an empty cave without reason kōngxuéláifēng 空穴来风 lit. wind from an empty cave (idiom) kōngxuéláifēng 空穴來風 lit. wind from an empty cave (idiom) hángkōngxué 航空学 aviation science hángkōngxué 航空學 aviation science kǒngxuèzhèng 恐血症 blood phobia