Definition
A high-resolution photographic film used to store greatly reduced images of printed documents, drawings, or technical publications, allowing large volumes of paper records to be archived in a compact form and viewed using a magnifying reader.
Plain English
A film that holds tiny photographs of pages, which can be read by enlarging them on a special viewer.
Context Anchor
Seen in older aircraft maintenance records, technical libraries, parts catalogs, and document storage systems.
Derivation
From Greek mikros meaning small, plus film. The name describes its purpose: photographic film carrying images shrunk to a very small size.
Why Pilots Care
Allows thousands of pages of technical data to fit in a small canister, useful for pre-digital storage of charts and manuals.
Analogy
Microfilm is like taking a very detailed photo of a page and shrinking it so much that it needs a special magnifier to read.
Example Sentence 1
The mechanic searched the shop's microfilm library to find the original service bulletin for the aging engine.
Example Sentence 2
Older aircraft operators still keep microfilm copies of the approved flight manual on hand.