billionth of a meter, or approximately the length of 10 hydrogen atoms strung together.
billionth of a second.
billionth of a gram can kill one person.
billionth baby or not, I'm a happy mother.
billionth digital song in February.
billionth hand is on.
Generally defined, nanotechnology is the field concerned with creating machines along the scale of a nanometer, a billionth of a meter.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.