A variant or alternate form of 'hendecahedra'; plural solids with eleven faces.
Likely a variant spelling or mistranscription of 'hendecahedra,' the Greek plural of hendecahedron. May appear in older mathematical texts or alternative notations.
Medieval and Renaissance mathematicians often used inconsistent spellings for the same term—'hendedra' might reflect how geometric terminology evolved differently across languages and regions before standardization.
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