Originally: a substance that started in a plastic (mouldable) state and was subsequently made hard or rigid (now disused). In later use: a plastic…

A plastic made from casein by treatment with formaldehyde, often used as a substitute for tortoiseshell, horn, etc. Frequently attributive. Cf. case…

A type of laminated plastic reinforced with paper, widely used as an electrical insulating material. Frequently attributive.

any of a group of plastics made from casein, usually by hardening with formaldehyde; cf. Galalith, n.

Chemistry. In the names of substances which are polymers of compounds containing a vinyl group —CH=CH2. a fairly soft plastic in which the…

a plastic in which protein is the chief component; esp. a casein plastic.

A proprietary name for: a type of plastic made from polyvinyl chloride, used for chemically resistant piping, containers, and floor coverings.

An acrylic fibre, plastic, etc.; a piece, sheet, etc., of this material. Also as a mass noun: material of this kind.

any or all of the plastic materials that may be made using styrene.

A type of transparent plastic in which biological and palaeontological specimens can be embedded for the purposes of preservation, display, or…

acrylonitrile butadiene styrene, a hard composite thermoplastic used to make rigid moulded products such as car bodies and cases for computers…

A proprietary name for: a high-strength plastic used in manufacturing, made from a blend of polyphenylene oxide and polystyrene and resistant to…