atramentarium

From ātrāmentum (“ink”) +‎ -ārium (“place for”).

ātrāmentārium n (genitive ātrāmentāriī or ātrāmentārī); second declension

1. inkstand, inkhorn

Second-declension noun (neuter).

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

• “atramentarium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• "atramentarium", 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)
• atramentarium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.