billionth
part of speech
adjective and noun (billionth, billionths)
meaning for a pupil
1) Coming as number one billion in order (1,000,000,000th). tree →
2) One of a billion equal parts of something: 1/1,000,000,000. tree →
sense in the lessons
In maths, ordinal and fraction words. A nanometre is a billionth of a metre and a nanosecond is a billionth of a second. In news, «the billionth visitor» or «the billionth phone sold».
examples
- A nanosecond is a billionth of a second. tree →
- The company celebrated its billionth customer. tree →
- The world's billionth person was born in the 1800s. tree →
- Write one billionth as a fraction: 1/1,000,000,000. tree →
- Atoms are smaller than a billionth of a metre across. tree →
note
Maths: a billion today means 1,000,000,000 (a thousand million) in the UK, USA and elsewhere; an old British meaning was a million million. A billionth = 1 ÷ 1,000,000,000 = 0.000000001.
Trees and pragmatics
Every meaning and example of «billionth» parsed by Mova, each sentence with its dependency tree and frames.