Milli- Definition
mili, milə, milē
prefix
One thousandth (10−3 ).
Millisecond.
American Heritage
affix
One thousandth part of; the factor 10-3
Millimeter.
Webster's New World
Origin of Milli-
-
Latin mīlli- from mīlle thousand gheslo- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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