RhymeZone: antiplastic definitions

Definitions of antiplastic:

adjective: Diminishing plasticity.
adjective: (medicine) Preventing or checking the process of healing, or granulation.
adjective: Opposing the use of plastics, typically for environmental reasons.
noun: (medicine) Any substance that prevents the process of healing, or granulation.
noun: A substance added to clay to make it less malleable.

(Definitions from Wiktionary)