diacritical

From diacritic +‎ -al.

diacritical (comparative more diacritical, superlative most diacritical)

1. Capable of distinguishing or of making a distinction.
2. Of, pertaining to, or serving as a diacritic
   • 1869, Alexander John Ellis, On Early English Pronunciation:

     The reduplicated forms and the fineness of the diacritical strokes, render his book troublesome to the reader

diacritical (plural diacriticals)

1. A diacritic (mark).
   • 1999, Lee Seong-whan, Advances In Handwriting Recognition, page 54:

     This is often the case when diacriticals are written at the end of the word - the last character ends, but there is still some ink in the original writing order that should have been used up in the course of processing the various t's, i's, and apostrophes in the body of the word.