millēsĭmus — Lewis & Short
millēsĭmus (-lensimus), a, um, adj.mille,
I the thousandth (class.):
millesimam partem vix intellego,Cic. Att. 2, 4, 1; cf.:
in millesimo corpore,Cels. 2, 6:
inter mille rates tua sit millesima puppis, i. e. ultima, Ov H. 13, 97: usura,one for every thousand monthly, Sen. Ira, 3, 33:
pagina,Juv. 7, 100. —In plur.:
armillam, ex millesimis Mercurii factam,the thousandth part of gain vowed to Mercury, Petr. 67, 7.—Hence, adv.: millēsĭmum, for the thousandth time:
Q pater quartum vel potius millesimum nihii sapit,Cic. Att. 12, 5, 1.