Letterspacing

Noun

1. The amount of space between adjacent text characters.
2. The practice of typing a letterspace in between the letters of a word (for emphasis) or an abbreviation (for delimitation), which in current orthographies and styles tends to be limited (to only certain uses).

   "The typewritten identification papers from 1942 recorded the surname as A C K E R M A N N, with capitals and letterspacing."