subsignānus, a, um, adj. [sub-signum],
that is or serves under the standard : miles, a kind of legionary soldiers kept in reserve to strengthen the centre , Tac. H. 1, 70 fin. ; 4, 33; Amm. 29, 5, 23.
subsīgnānus adj. sub+signum, that serves under the standard : miles, reserves to stren...
An Elementary Latin Dictionary