noun
printed book; letterpress book
Refers specifically to a book produced by letterpress printing with movable type, as opposed to handwritten or woodblock-printed books.
この活版本は江戸時代に印刷された。
This letterpress book was printed in the Edo period.
版本 is a general term for a woodblock-printed book, whereas 活版本 specifically uses movable type.
Compound of 活版 (かっぱん, 'letterpress printing') and 本 (ほん, 'book').