I. ˈde-sə-məl, ˈdes-məl adjective
Etymology: French décimal, from Medieval Latin decimalis of a tithe, from Latin decima tithe — more at dime
Date: 1608
: numbered or proceeding by tens:
a. : based on the number 10 ; especially : expressed in or utilizing a decimal system especially with a decimal point
b. : subdivided into 10th or 100th units
decimal coinage
• dec·i·mal·ly -mə-lē adverb
II. noun
Date: 1651
: any real number expressed in base 10 ; especially : decimal fraction