Definition of "four-hundredth" []

• The ordinal number of four hundred in counting order (adjective)

WordNet. Princeton University. 2010.

• "And those findings are from Kepler's scanning of just one four-hundredth of the night sky, so the actual number of planets out there is presumably hundreds of times greater, Borucki said."
• "Two years from now Cubans will commemorate the four-hundredth anniversary of the arrival on the island of the image of Cuba's patron saint, the Virgin of Charity; the Pope himself is expected to visit."
• "To do that, it is scanning a small chunk of the sky, about one four-hundredth of the night sky with more than 150,000 stars to look for planets."