Assertion: polymer | /r/MadeOf | repeat units
Facets:
Source sentences:
text: Many polymers are made of repeat units derived from natural gas or coal or crude oil.
text: A polymer is a substance made of many repeating units.
text: A polymer is simply a material composed of many repeated units called monomers that link together into chains or branches.
text: A polymer ( ; Greek poly-, "many" + -mer, "part") is a substance or material consisting of very large molecules, or macromolecules, composed of many repeated subunits.