From holo- + -graph.

holograph (plural holographs)

1. (legal, textual criticism) A handwritten document that is solely the work of the person whose signature it bears, especially a letter, deed, or will; an original manuscript, a protograph.
2. A hologram.
   • 1983, Ellen Nevins, Encyclopedia of Computers and Electronics, page 108:

     Of course, it is impossible to show what a holograph is really like in a two dimensional picture such as this.

• French: holographe
• German: eigenhändiges Schriftstück, eigenhändig verfasstes, handschriftliches Dokument

holograph (holographs, present participle holographing; simple past and past participle holographed)

1. To record by means of holography.