Decimal?
period
The period is used as a decimal point in our number system.
To write a decimal you go to the end of the whole number 5 for example and then you put a period (5.) then you add the rest of the decimal like 5.6
the decimal point
You can add a period, and a zero, after the whole number. Or you can just consider the whole numbers themselves a special kind of "decimal number".
You put a period between the dollars and cents.
period
8.7. A decimal point (the period in math) says that it's a decimal. A decimal is a fraction of the whole, expressed with the period and means tenths. So the number given is eight wholes and 7/10 of a whole.
Undetermined. A decimal is the period(.) used in a complex number like 23.87
It was the mesolithic period.
The time period between cell divisions is called interphase. ;)