Definify.com
Webster 1913 Edition
Diacritical
{
Diˊa-crit′ic
,Diˊa-crit′ic-al
, }Adj.
[Gr. [GREEK], fr. [GREEK] to separate, distinguish;
διά
through + [GREEK] to separate. See Critic
.] That separates or distinguishes; – applied to points or marks used to distinguish letters of similar form, or different sounds of the same letter, as, ā, ă, ä, ō, ŏ, 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.
Webster 1828 Edition
Diacritical
DIACRITICAL
,Adj.
The short vowel is never signified by any diacritical mark.