billionth

Preposition: of

• meter: This is the manufacture of devices which are a few billionths of a meter in size.
• meter: A nanometer is a billionth of a meter, or approximately the length of 10 hydrogen atoms strung together.
• second: We can do this to an accuracy of better than a billionth of a second.
• gram: Deadly amount One billionth of a gram can kill one person.

Adjective modifier

• few: This is the manufacture of devices which are a few billionths of a meter in size.

Modifies a noun

• acre: Next spring, we will see our 10th year of planting biotech crops in the U.S. We'll probably pass the billionth acre.
• baby: Regardless of whether he's the six billionth baby or not, I'm a happy mother.
• song: Apple sells about 3 million songs a day for 99 US cents each, and sold its 1 billionth digital song in February.
• download: Earlier this year, Apple's iTunes service recorded its one billionth download.
• hand: The wait for the ten billionth hand is on.