- denoting a thousandth
- (as noun): a millesimal
- of, consisting of, or relating to a thousandth
WordReference Random House Unabridged Dictionary of American English © 2026
mil•les•i•mal
(mi les′ə məl),USA pronunciation adj.
n.
mil•les′i•mal•ly, adv.
- thousandth.
n.
- a thousandth part.
- Latin millēsim(us) thousandth (mille thousand + -ēsimus ordinal suffix) + -al1
- 1710–20
Collins Concise English Dictionary © HarperCollins Publishers::
millesimal /mɪˈlɛsɪməl/ adj