Mas ainda existe palavras maiores registradas pelo Guiness Book. Geralmente palavras com tamanhos extensos são nomes químicos. Um exemplo é o DNA, que se escrito na sua forma completa, completaria mais de 1.000.000.000 de letras, mas nunca foi (e nem será) usado. Não há limite teórico para o tamanho de uma palavra química, mas a maior que já usaram foi uma de 1185 letras que apareceu nos sumários químicos da sociedade química americana. Ela:
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