An interpunct ⟨·⟩, also known as an interpoint, middle dot, middot and centered dot or centred dot, is a punctuation mark consisting of a vertically centered dot used for interword separation in ancient Latin script.
What are the dots in between letters called?
It is called the interpunct.
What are the dots separating words?
Within a dictionary entry, the dots that break up a word are known as end-of-line division dots. These dots indicate where the word can be broken if it doesn't fit on a line of text. These dots do not indicate the possible syllable breaks of the word; syllable breaks are shown with hyphens in the pronunciation.