a. [a. F. arbitral, ad. late L. arbitrālis, f. arbiter: see -AL. Chiefly in Sc. Law.]
1. Of or pertaining to arbiters or arbitration.
1609. Skene, Reg. Maj., vii. Argt., In qvhat place or at qvat time ane decreit arbitrall sould be given.
1612. Monipennie, Abr. Chron., in Misc. Scot., I. 20. Elected as judge arbitrall to discerne upon certain high controversies.
1799. J. Robertson, Agric. Perth, 40. Their decisions are of the nature of a decreet arbitral.
1871. Daily News, 22 April, 6. To concede power to the arbitral jury to reduce all rents.
2. Subject to the exercise of will.
1662. J. Chandler, Van Helmonts Oriat., 119. Not as free contingencies, or arbitral, and much lesse as necessary ones.