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noun, Chemistry.
any of the class of thermosetting resins formed by the condensation of , or of a derivative, with an aldehyde, especially formaldehyde: used chiefly in the manufacture of paints and plastics and as adhesives for sandpaper and plywood.
any one of a class of resins derived from phenol, used in paints, adhesives, and as thermosetting plastics See also Bakelite


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