S / subsignānus
adjective

subsignānus

fem. subsignāna · neut. subsignānum
sub-signum
that is; serves under the standard
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.