| Decagonal (a.) Pertaining to a decagon; having ten sides. Thesaurus Entries algorismic, algorithmic, aliquot, cardinal, decagonal, decahedral, decasyllabic, decuple, denary, differential, digital, even, exponential, figural, figurate, figurative, finite, fractional, imaginary, impair, impossible, infinite, integral, irrational, logarithmic, logometric, negative, numeral, numerary, numerative, numeric, odd, ordinal, pair, positive, possible, prime, radical, rational, real, reciprocal, submultiple, surd, tenfold, tenth, tithe, transcendental |