DIACRITICAL
diacritic, diacritical
(adjective) capable of distinguishing; “students having superior diacritic powers”; “the diacritic elements in culture”- S.F.Nadel
Source: WordNet® 3.1
Etymology
Adjective
diacritical (comparative more diacritical, superlative most diacritical)
Capable of distinguishing or of making a distinction.
Of, pertaining to, or serving as a diacritic
• A. J. Ellis
Noun
diacritical (plural diacriticals)
A diacritic (mark).
Source: Wiktionary
Di`a*crit"ic, Di`a*crit"ic*al, a. Etym: [Gr. Critic.]
Definition: That separates or distinguishes; -- applied to points or marks
used to distinguish letters of similar form, or different sounds of
the same letter, as, a, â, ä, o, ô, etc. "Diacritical points." Sir W.
Jones.
A glance at this typography will reveal great difficulties, which
diacritical marks necessarily throw in the way of both printer and
writer. A. J. Ellis.
Source: Webster’s Unabridged Dictionary 1913 Edition