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1. Thousandth.
2. Consisting of a thousandth.
3. Relating to thousandths.
A thousandth.

[From Latin mīllēsimus, from mīlle, thousand; see gheslo- in Indo-European roots.]

mil·les′i·mal·ly adv.


1. (Mathematics)
a. denoting a thousandth
b. (as noun): a millesimal.
2. (Mathematics) of, consisting of, or relating to a thousandth
[C18: from Latin mīllēsimus]


(mɪˈlɛs ə məl)

adj. n.
2. a thousandth part.
[1710–20; < Latin millēsim(us) thousandth (mille thousand + -ēsimus ordinal suffix) + -al1]
mil•les′i•mal•ly, adv.
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References in periodicals archive ?
By law, the traditional ckuk kam jewelry of the Hong Kong region of China must be of at least 990 millesimal fineness, that is, 99.0 percent pure gold.
Homeopathy, an innocuous and eco-friendly alternative, has been proposed to strengthen biological systems against diseases and uses dilutions from decimal (low-dilution) to millesimal (very high-dilution) potencies (Bellavite & Signorini, 2002).
The same author reported that the decimal, centesimal or fifty millesimal Hahnemannian dilution orders show different biological effects; however, they are not directly correlated due to their magnitude.
In numerous European countries, the rates are determined according to the Millesimal fineness scale, which is getting in vogue as a fresh technique of measuring the rates and purity of gold.