What does celluloid mean?
Celluloid is a transparent, lightweight plastic made from cellulose nitrate blended with camphor, patented in the nineteenth century and celebrated as the first commercially successful synthetic plastic. Because it could be molded into thin, flexible sheets, it became the medium of early photography and motion pictures — for decades, every film reel was a strip of celluloid. It also served everyday purposes, appearing in combs, piano keys, shirt collars, and toys before safer plastics such as acetate replaced it. A significant drawback was its extreme flammability: nitrate film could ignite spontaneously and burn fiercely, which is why surviving prints require special archival care. Today the word survives most often in figurative use, as when an actor's work is described as living 'on celluloid,' a phrase that evokes the golden age of cinema even though modern film stock no longer contains the original substance.
A flammable transparent thermoplastic made from cellulose nitrate and camphor, used especially for photographic and motion-picture film and formerly for many small molded goods.
"Combs made of celluloid imitated ivory at a fraction of the cost."
Uncountable as a material noun.
Celluloid film; motion pictures collectively, especially in figurative expressions such as 'on celluloid'.
"That era of Hollywood now exists only on celluloid."
Rarely used; the plural appears chiefly in historical references to items made of celluloid (such as detachable collars) rather than to the material itself.
"Victorian gentlemen wore starched celluloids with their evening dress."
Celluloid was the first commercial plastic ever invented — and because old nitrate film is so flammable, cinema archives literally store their history in fireproof vaults.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of celluloid
The word celluloid combines 'cellulose,' from French cellulose (itself from Latin cellula, 'little cell'), with the suffix '-oid,' meaning 'resembling.' It was coined in the 1860s–1870s for the plastic developed by American inventor John Wesley Hyatt, whose firm trademarked the name. Cognates sharing the same Latin root include cellulose, cellular, and cell itself.
How celluloid is actually used
As a material noun, celluloid is uncountable. The figurative sense ('on celluloid', 'the age of celluloid') is somewhat literary or nostalgic, evoking classic cinema; modern film stock is no longer made of true celluloid.
Easily confused with celluloid
Celloid is not a standard English word; 'celluloid' is the correct spelling for both the plastic and figurative senses.
Collodion is a syrupy solution of nitrocellulose used in medicine and early photography, whereas celluloid is the hardened plastic made from nitrocellulose and camphor.