Crabra
From LSJ
οὐετρανοὶ οἱ χωρὶς χαλκῶν → veterans who have not received bronze copies of the privileges granted on discharge
Crabra: (ae) aqua,
I an aqueduct or water conduit that extended from Tusculum to the Tiber, Cic. Agr. 3, 2, 9; id. Fam. 16, 18, 3; Front. Aquaed. 9.