正せい二に十じゅう面めん体たいMeaningsNoun1. regular icosahedronKanji used正correct二two十ten面surface体bodyComposed of正せい(logical) true; regular; 10^40; ten duodecillion; original; positive; greater than zero; thesis (in dialectics)Noun二に十じゅうtwenty; 20Numeric面めん体たいfacepiece (of a respirator, etc.)Noun