cel·lu·loid

[sel-yuh-loid]
noun
1.
a tough, highly flammable substance consisting essentially of cellulose nitrate and camphor, used in the manufacture of motion-picture and x-ray film and other products.
2.
motion-picture film.
adjective
3.
Informal. of or involving motion pictures.

Origin:
former trademark; cellul(ose) + -oid

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
celluloid (ˈsɛljʊˌlɔɪd) [Click for IPA pronunciation guide]
 
n
1.  a flammable thermoplastic material consisting of cellulose nitrate mixed with a plasticizer, usually camphor: used in sheets, rods, and tubes for making a wide range of articles
2.  a.  a cellulose derivative used for coating film
 b.  one of the transparent sheets on which the constituent drawings of an animated film are prepared
 c.  a transparent sheet used as an overlay in artwork
 d.  cinema film

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Celluloid is always a great word to know.
So is slumgullion. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a stew of meat, vegetables, potatoes, etc.
Etymonline
Word Origin & History

celluloid
1871, trademark name (reg. U.S.), coined by U.S. inventor John Wesley Hyatt (1837-1900) from L. cellula dim. of cella (see cell) + -oid, from Gk. -o-eides "a form, shape" (comb. form). Abbreviated form cell "sheet of celluloid" is from 1933.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
It's certainly violent: blood practically drips off the celluloid frames.
Finally it occurred to him that a new substance on the market called celluloid
  might answer.
Any celluloid still out there is in risk of deteriorating.
As a character she may be more patchwork fakery, made up of bits of celluloid,
  than a dimensional character.
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