M0301200 (mə-lĕs′ə-məl)adj.1. Thousandth.2. Consisting of a thousandth.3. Relating to thousandths.n. A thousandth.[From Latin mīllēsimus, from mīlle, thousand; see gheslo- in Indo-European roots.]mil·les′i·mal·ly adv.
millesimally
(mɪˈlɛsɪməlɪ) advin a millesimal mannerEncyclopediaSeemillesimal