icosahedral
EnglishMerriam-Webster Dictionaryguished gentlemen //… Belgium's capital had gathered then her beauty and her chivalry … — Lord Byron
: the system, spirit, or customs of medieval knighthood //But Lancelot on him urged / All the devisings of their chivalry … — Alfred Tennyson
: the qualities of the ideal knight : chivalrous conduct //… chivalry demanded of him that he be conspicuous through his gallant, courteous, and generous behavior. — H. W. Van Loon