letterset

plural lettersets

1. A set of letters of the alphabet.

   The early version of the test used the letters F, A, S and the test was often known as the "FAS test". However, use of the lettersets C, F, L and P, R, W is preferable, because the two sets are matched for letter frequency.

   2018, Veronica A. Bradley, John L. Welch, Clive E. Skilbeck, Cognitive Retraining Using Microcomputers

2. mediaA sheet of letters or other characters to be applied by dry transfer.

   Skill to prepare polyester form overlays by transferring letters and/or numerals from a letterset to a clear polyester sheet.

   1990, United States. Office of Personnel Management. Office of Classification, Position Classification Standards: For Positions Under the General Schedule Classification System (page 7, page 30)