正せい八はち面めん体たいMeaningsNoun1. regular octahedronKanji used正correct八eight面surface体bodyPitch accentせいはちめんたいComposed of正せい(logical) true; regular; 10^40; ten duodecillion; original; positive; greater than zero; thesis (in dialectics)Noun八はちeight; 8Numeric面めん体たいfacepiece (of a respirator, etc.)Noun