complemental

adjective
com·​ple·​men·​tal | \ˌkäm-plə-ˈmen-tᵊl \

Definition of complemental 

1 : relating to or being a complement

2 obsolete : ceremonious, complimentary

First Known Use of complemental

1597, in the meaning defined at sense 1

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The first known use of complemental was in 1597

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Britannica English: Translation of complemental for Arabic Speakers

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