quăternārĭus — Lewis & Short
quăternārĭus, a, um, adj.quaterni,
scrobes quaternarii, hoc est quoquoversus pedum quattuor,four feet square, Col. 11, 2, 28:
numerus,the number four, the quaternary, Plin. 28, 6, 17, § 64:
formae, of coins,Lampr. Alex. Sev. 38.