The ordinal number of forty-nine in counting order(adjective)
WordNet. Princeton University. 2010.
Use "49th" in a sentence
"The film's peculiar power owes much to Eric Portman who, as the enigmatic Thomas Colpeper - local Justice of the Peace, prophet and one of Powell's many screen alter-egos - delivers an intense and complex performance, just as he had in 49th Parallel three years earlier."
"The one on 7th Ave.btw. 48th & 49th is pretty dingy, while the one on 46th (btw."
"A certain captain in the 49th was a confirmed duellist, with a reputation of being a dead shot at short range."