a fraction whose denominator is some power of 10, usually indicated by a dot (decimal point or point) written before the numerator: as 0.4 = 4/10; 0.126 = 126/1000.

noun

a full stop or a raised full stop placed between the integral and fractional parts of a number in the decimal system

A period used in decimal notation to separate whole numbers from fractions, as in the number 1.3, which represents 1 + 310.

A decimal having no digits to the left of the decimal point except zero, such as 0.2 or 0.00354.

The point or dot placed to the left of decimals to separate them from the whole number portion of the decimal. When the number is spoken aloud, the word point is usually used to signify the decimal point. For example, “8.3” is read “eight point three.”