掌しょう中ちゅう本ぼん

noun

pocket edition; pocket-sized book

Refers to a small-format book designed to be carried in a pocket. The term is somewhat formal and may be encountered in bibliographic contexts.

• この辞じ書しょは掌しょう中ちゅう本ぼんなので、持もち運はこびに便べん利りだ。

  This dictionary is a pocket edition, so it's convenient to carry around.