position 1, 000, 000, 000 in a countable series of things
one part in a billion equal parts
[ Syn: one-billionth ]
billionth (n.)
the ordinal number of one billion in counting order
position 1, 000, 000, 000 in a countable series of things
one part in a billion equal parts
[ Syn: one-billionth ]
the ordinal number of one billion in counting order