microfilm

noun

1. (countable, uncountable)A continuous roll of film containing photographs of documents at a greatly reduced size.

   “This detail made it easier, decades later, when I was browsing through reels of microfilms of The New York Times, to establish that morning’s date.”

verb

1. (transitive)To reproduce (documents) on such film.

   “Power set up a camera in the British Museum and eventually microfilmed many pre-1640 English books that he selected from Pollard and Redgrave’s Short-Title Catalogue (STC) and other important works in the museum’s collections.”