This is not a dictionary! - Search for "billionth" in The Danish Dictionary
February 26. 2013 from wordnet.princeton.edu
position 1,000,000,000 in a countable series of things
February 27. 2016 from wordnet.princeton.edu
one part in a billion equal parts
March 23. 2016 from wordnet.princeton.edu
billionth — adjective — english
the ordinal number of one billion in counting order
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