trojan, adj. & n.
--adj. of or relating to ancient Troy in Asia Minor.
--n.
1 a native or inhabitant of Troy.
2 a person who works, fights, etc. courageously (works like a Trojan).
Trojan Horse
1 a hollow wooden horse said to have been used by the Greeks to enter Troy.
2 a person or device planted to bring about an enemy's downfall.
ME f. L Troianus f. Troia Troy