小数点英语怎么说

小数点在英语中叫做 decimal point。

它的来源可以追溯到古罗马时期，当时人们使用十进制数字系统，并在数字中使用一个点（dot）来表示十进制数字的小数部分。

例句：

The decimal point is used to separate the whole number part from the fractional part of a decimal number.
The weight is measured in pounds and ounces, with the decimal point indicating the number of ounces.
You can use the decimal point to round a number to a specific number of decimal places.