D defs.my
Entry 1 sense Webster, 1913

Onomastic

/(ŏn`ō̇*măs"tĭk)/ · On·o·mas·tic · IPA /ˌɑː.noʊˈmæs.tɪk/
01 a. Applied to a signature when the body of the instrument is in another's handwriting.
  1. 1.
    Applied to a signature when the body of the instrument is in another's handwriting.(Law)