noun
handwritten manuscript
Refers to a manuscript written by hand, as opposed to a typed or printed one. Often used in publishing or literary contexts.
編集者は作家の生原稿を受け取った。
The editor received the author's handwritten manuscript.
原稿 is a general term for manuscript, which can be handwritten, typed, or digital. 生原稿 specifically emphasizes that it is handwritten.
Compound of 生 (なま, 'raw, unprocessed') and 原稿 (げんこう, 'manuscript'). The prefix 生 here indicates the original, unedited, handwritten state.