ELI5: Explain Like I'm 5

Semigraphical character

A semigraphical character is like a picture used to show something, but it's not a real picture. It's like using letters, numbers, or symbols to make a picture. Like when people use the colon and parentheses to make a smiley face, :) . The semigraphical character is made up of letters, numbers, or symbols to look like something else. It's like magic, but it's not real.