My understanding is that a symbol in typography is often called a glyph. There are cases when one glyph is composed of multiple “components” with space in between them, e.g.
Is there any name for these “components” (e.g. one dot in a colon)?
Most parts of letters are named, and there are some terms which only apply to a single letter. For example the spine of the S.
Here is a good article to read.
Source : Link , Question Author : Brano , Answer Author : Azur Mesic