decimal point

noun3

1. •
   A period/full stop ⟨.⟩ or middot ⟨·⟩ used to set off the decimal or fractional part of a number, traditionally widely used in some countries but not others.
2. •
   Any decimal mark (decimal separator), inclusive of commas, separatrices, etc.
3. •
   (nonstandard) A decimal place.