What Character Was Removed from the Alphabet But Is Still Used Every Day?

This one.

From a piece on Hot Word...

The shape of the character (&) predates the word ampersand by more than 1,500 years. In the first century, Roman scribes wrote in cursive, so when they wrote the Latin word et which means “and” they linked the e and t. Over time the combined letters came to signify the word “and” in English as well. Certain versions of the ampersand, like that in the font Caslon, clearly reveal the origin of the shape.

The word “ampersand” came many years later when “&” was actually part of the English alphabet.