ALLOGRAPH
allograph
(noun) a signature written by one person for another
allograph
(noun) a variant form of a grapheme, as âmâ or âMâ or a handwritten version of that grapheme
Source: WordNet® 3.1
Etymology
Noun
allograph (plural allographs)
A variant form of a letter (or other grapheme).
A signature made by one person for another (compare autograph).
Source: Wiktionary
Al"lo*graph, n. Etym: [Gr. -graph.]
Definition: A writing or signature made by some person other than any of
the parties thereto; -- opposed to autograph.
Source: Webster’s Unabridged Dictionary 1913 Edition