deontic

adjective
de·​on·​tic | \(ˌ)dē-ˈän-tik \

Definition of deontic 

: of or relating to moral obligation : deontological

First Known Use of deontic

1951, in the meaning defined above

History and Etymology for deontic

Greek deont-, deon that which is obligatory, from neuter of present participle of dein to lack, be needful — more at deuter-

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The first known use of deontic was in 1951

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obstinately defiant of authority

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