1 example sentence using allograph.
Allograph used in a sentence
Allograph in a sentence as a noun
Prior to that, the former had been merely allographs of the latter." So at Julius Caesar's time, I and J were the same letter that you could write either way.
Allograph definitions
noun
a variant form of a grapheme, as `m' or `M' or a handwritten version of that grapheme
noun
a signature written by one person for another