atrum

ātrum

1. inflection of āter:
   1. nominative/accusative/vocative neuter singular
   2. accusative masculine singular

• "atrum", 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)

ātrum

1. dative plural of ātor