Improve ثالثی meaning in English

Is there any meaning of the word ثالثی that needs an edit? Please click that meaning to rewrite it.

arbitersarbitrablearbitragearbitragerarbitragesarbitrageurarbitralarbitratearbitratedarbitratesarbitrationarbitrationalarbitrativearbitrementarbitressmediacymediatedmediatenessmediationmediationsmediatizationmediatorialmediatorshipmediatorymediatressmediusesmedullated

Is there any meaning of the word ثالثی that needs to be removed from the list? Please click that meaning to mark it for deletion.

arbitersarbitrablearbitragearbitragerarbitragesarbitrageurarbitralarbitratearbitratedarbitratesarbitrationarbitrationalarbitrativearbitrementarbitressmediacymediatedmediatenessmediationmediationsmediatizationmediatorialmediatorshipmediatorymediatressmediusesmedullated

Do you want to add a new meaning, definition, and a sentence of the word ثالثی? Please feel free to add.