I. ˈdesəməl adjective
Etymology: from (assumed) New Latin decimalis, from Medieval Latin, relating to tithes, from Latin decima tithe + -alis -al — more at dime
1.
a. : numbered or proceeding by tens : based on the number 10
b. : subdivided into 10th or 100th units
decimal coinage
decimal hour
c. : expressed in a decimal fraction
a decimal equivalent
2.
[Medieval Latin decimalis ]
: of or relating to tithes
II. noun
( -s )
1. : a number expressed in the scale of tens
2. : decimal fraction