Xylonite is another name for celluloid.

Xenon, xylocarp, xylonite.

Alexander Parkes (1813-1890) invented the first manmade plastic, Parkesine (aka synthetic ivory), in 1856. It was a form of pyroxylin (celluloid) and did not find the economical uses that its later successors, Celluloid and Xylonite, did.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern X---NI-E. That is, eight letter words with 1st letter X and 5th letter N and 6th letter I and 8th letter E. In alphabetical order, they are:

xylonite

A substance composed essentially of gun cotton and camphor, and when pure resembling ivory in texture and color, but variously colored to imitate coral, tortoise shell, amber, malachite, etc. It is used in the manufacture of jewelry and many small articles, as combs, brushes, collars, and cuffs; -- originally called xylonite.