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| the molecular weight of a substance expressed in grams; a gram molecule |
| any of a number of polymers containing alternate silicon and oxygen atoms and that are fluid, resinous, rubbery, extremely stable in high temperatures, and water-repellent |
| polyvinyl resin | |
| —n | |
| any of a class of thermoplastic resins that are made by polymerizing or copolymerizing a vinyl compound. The commonest type is PVC | |