billionth
pronunciation
How to pronounce billionth in British English:
UK ['bɪljənθ]
How to pronounce billionth in American English:
US [ˈbɪljənθ]
-
- Noun:
- position 1,000,000,000 in a countable series of things
- one part in a billion
-
- Adjective:
- the ordinal number of one billion in counting order
Word Origin
- billionth
- 1778, from billion + -th (2).
Example
- 1. A nanometre is a billionth of a metre .
- 2. How better to celebrate your billionth download than with a brand new app store ?
- 3. Today 's most powerful versions can shine ten thousand times brighter than the sun , though only for a billionth of a second .
- 4. At that height , the atmosphere has tapered away to almost nothing -- less than a billionth of the pressure it is at ground level -- but there are still gasses there .
- 5. Unfortunately for physicists , dr hawking also predicted that the typical temperature at which a black hole radiates should be about a billionth of that of the background radiation left over from the big bang itself .