Word Study
Retiarius
CIDE DICTIONARY
Retiarius, n. [L., fr. rete a net.].
A gladiator armed with a net for entangling his adversary and a trident for despatching him. [1913 Webster]
OXFORD DICTIONARY
Retiarius, n. (pl. retiarii) a Roman gladiator using a net to trap his opponent.
Etymology
L f. rete net
For further exploring for "Retiarius" in Webster Dictionary Online