a. [f. L. bimestri-s (f. bi- two + mensis month) + -AL 1.] Of two months’ duration; occurring every two months.

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1846.  Worcester cites Q. Rev.

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1870.  Lowell, Among my Bks., Ser. II. (1873), 11. An office which the Florentines had made bimestrial in its tenure.

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