Wiktionary
n. A small card bearing a microreproduction of text, resembling the microfiche format but on cardboard rather than photographic film.
Usage examples of "microcard".
Carelessly shoved in a pigeonhole I found another microcard that looked familiar, and when I slipped it mechanically into the viewer it turned out to be a book on mountaineering which, oddly enough, I remembered buying as a youngster.
My solid-state memory microcards have been used to smuggle documentary films into China and send a million-volume library to Mars.
Today all the microcards and wordspools had dealt with the pharmaceutical division of Walbrook.
After he finished telling the librarian how his microfilm files ought to be organized and how they ought to switch from microfilm to microcard and how in spite of everything the New York Public Library wasn't such a bad place to research, he got down to work.