[dec.i.mal] adj [F decimal, fr. ML decimalis of a tithe, fr. L decima tithe--more at dime] (1608): numbered or proceeding by tens: a: based on the number 10; esp: expressed in or utilizing a decimal system esp. with a decimal point b: subdivided into 10th or 100th units "~ coinage" -- dec.i.mal.ly adv
[2]decimal n (1651): any real number expressed in base 10; esp: decimal fraction