billionth

nouns

position 1,000,000,000 in a countable series of things
billionth
domain region
North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
America, U.S., U.S.A., US, USA, United States, United States of America, the States
is a type of (narrower)
relative status
"his salary was determined by his rank and seniority"
rank
one part in a billion equal parts
billionth, one-billionth

adjectives

the ordinal number of one billion in counting order
billionth
is similar to
being or denoting a numerical order in a series
"ordinal numbers"; "held an ordinal rank of seventh"
ordinal