Question

what is the dot that appears on the lower case of the alphabet 'i' called?

Answer 1

thar dot that appears on the lower case of the alphabet 'i' is called j.

Answer 2

The dot over i indicates the term diacritic, or that, it is an identification mark.

It helps to make these letters recognizable.

There is usually the accent mark which is important while we speak about a stressed syllable. When the dot is paired over i and j, it is called the tittle.

This is actually a term derived from the Latin word titulas which means glyphics, stress or inscription.