in Arithmetic, signifies that part of an infinite decimal fraction, which is continually repeated ad infinitum. Thus in the numbers 2.131313 &c., the figures 13 are the repetend and marked thus 13. These repetends chiefly arise in the reduction of vulgar fractions to decimals. Thus, $\frac{1}{3} = 0.333\ldots$ &c. = 0.3.