noun
microcard
A microform card containing reduced-size reproductions of documents, used for archival storage and reading with a microcard reader.
図書館の古い資料はマイクロカードで保存されている。
Old materials in the library are preserved on microcards.
Microfilm is a roll of film, while a microcard is a flat card. Both are microform media, but microcards are less common today.
Loanword from English 'microcard'.