hastātīm pl (genitivehastātōrum); second declension
(military, plural only) first line of the pre-Marian Roman army (before, respectively, the prī̆ncipēs and the triāriī)
27 BCE – 25 BCE, Titus Livius, Ab Urbe Condita7.23:
Ab Romanis necopus intermissum—triarii erant, qui muniebant—etabhastatis principibusque, quipro munitoribus intenti armatique steterunt, proelium initum.