adiutorium

• adjūtōrium

From adiūtor (“helper”) +‎ -ium.

adiūtōrium n (genitive adiūtōriī or adiūtōrī); second declension

1. help, assistance, support, aid

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• adiūtor

• "adjutorium", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• Walther von Wartburg (1928–2002) “adjutorium”, in Französisches Etymologisches Wörterbuch, volume 24: Refonte A–Aorte, page 164