decimal marker
Computing term for the symbol used to separate the integer part from the fractional part of a number, such as a period or comma.
A period or comma is used as the decimal marker depending on the country.
Refers to the decimal point itself, while 小数点記号 is the broader computing term for the symbol used as a decimal marker.
Compound of 小数点 (decimal point) and 記号 (symbol, mark).