The ordinal number of two hundred in counting order(adjective)
WordNet. Princeton University. 2010.
Use "two-hundredth" in a sentence
"After the two-hundredth or three-hundredth time, it was kind of hard to act excited about it."
"At the end of the decade, the government set up a special commission to oversee the commemoration of the two-hundredth anniversary of the French Revolution in 1989."
"And though it's remarkable to note how many weeks in a row that Freddie Mac's mortgage rate series has marked new records (seven times in the past eight weeks), the week-to-week changes have been tiny, usually only one-hundredth or two-hundredth of a percentage point at a time."