idiograph

American  

[id-ee-uh-graf, -grahf] / ˈɪd i əˌgræf, -ˌgrɑf /

noun

1. a mark or signature characteristic of a particular person, organization, etc.; trademark.

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Etymology

Origin of idiograph

1615–25; < Late Greek idiógraphon, noun use of neuter of Greek idiógraphos self-written. See idio-, -graph