__ Fiber, Synthetic Material Used to Make Bicycles
Puzzle 16 of Canadian Stars Medium Pack
Question is: __ Fiber, Synthetic Material Used to Make Bicycles
and the answer is: CARBON
Word Meaning:
CARBON — (uncountable) The chemical element (symbol C) with an atomic number of 6. It can be found in pure form for example as graphite, a black, shiny and very soft material, or diamond, a colourless, transparent, crystalline solid and the hardest known material.
Definitions from Wiktionary.