S / sub-dīmĭdĭus
adjective hapax

sub-dīmĭdĭus

fem. sub-dīmĭdia · neut. sub-dīmĭdium
of a number
half as much less; less by one half of itself
half as much less, less by one half of itself (i. e. that bears to another the ratio of 2 to 3): numerus (opp. superdimidius), Mart. Cap. 7, § 761.