nondegradable

adjective
non·​de·​grad·​able | \ ˌnän-di-ˈgrā-də-bəl How to pronounce nondegradable (audio) , -dē-\

Definition of nondegradable

: incapable of being chemically degraded : not degradable nondegradable plastics

First Known Use of nondegradable

1895, in the meaning defined above

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