WordNet
Usage examples of "a billion".
When one of these hits an atom in Earth's atmosphere, it splatters it into a shower of a billion fragments that spray out over one hundred square kilometers of Earth's surface.
But when the sun is roughly a third of a billion miles away it doesn't do any harm.
Here he was in a ship that could cross half a billion miles of space and travel at thousands of miles an hour-and he could not save a friend drifting slowly to his death a mere ten miles away.
Earth-two was smaller in population by over a billion, but it was larger in extent.
It was almost half a billion tons of water, all in one piece, and he was standing on it.
Apparently thats happened several times before, at intervals of a third of a billion years--great diebacks of intelligent life, leaving only spores.
And if you assumed there were a billion women in the world, what percentage would it be?
Apparently that's happened several times before, at intervals of a third of a billion yearsgreat diebacks of intelligent life, leaving only spores.
Like a monstrous cannonball, the titanic mass of iridium, more than a mile in diameter, ascends straight up through a billion tons of debris, the decimated seafloor crumbling within the vacuum of the rising colossus's wake.