Ligature
Ligature" src="http://typographydeconstructed.com/wp-content/uploads/2010/12/ligature-white.gif" alt="Ligature" width="190" height="190" />Two or more letters are joined together to form one glyph or character.
mw Reference
A printed or written character (as æ or ƒƒ) consisting of two or more letters or characters joined together.