noun, plural bil·lions, (as after a numeral) bil·lion.
Origin of billion
Related formsbil·lionth, adjective, noun
Examples from the Web for billionth
The temperature of Cygnus X-1 from Hawking radiation is roughly a billionth of a degree above absolute zero.
We've moved from computers with a trillionth of the power of a human brain to computers with a billionth of the power.
Thus, to trace it, the autopsy doctors would have to find, separate or segregate a billionth bit of the mass under observation.
We may be cousins to the worm, at the billionth remove; but we are not brothers.The Color Line|William Benjamin Smith
The vibrations which thus occasion light are, at a mean, 555 in the billionth of a second.History of the Intellectual Development of Europe, Volume II (of 2)|John William Draper
British Dictionary definitions for billionth
noun plural -lions or -lion
- amounting to a billionit seems like a billion years ago
- (as pronoun)we have a billion here