noun, plural quad·ril·lions, (as after a numeral) quad·ril·lion.
- quadripedal extensor reflex,
Origin of quadrillion
Examples from the Web for quadrillion
"Three quadrillion times, my son," replied his father with perfect accuracy and a spirit of hourly freshness.The Kentucky Warbler|James Lane Allen
The observatory on Pluto had reported a free planet passing within two hundred quadrillion miles of the solar system.Unthinkable|Roger Phillips Graham
Their velocity was six hundred and sixty quadrillion miles per second!Invaders from the Infinite|John Wood Campbell
For the enormous majority of us there is no difference in this respect between a hundred and a quadrillion.Getting Married|George Bernard Shaw
At this rate of growth from a single cholera bacillus sixteen quadrillion might arise in a single day.Disease and Its Causes|William Thomas Councilman
- amounting to this numbera quadrillion atoms
- (as pronoun)a quadrillion
Word Origin for quadrillion
1670s, from French quadrillion (16c.) from quadri- "four" (see quadri-) + (m)illion. Cf. billion. In Great Britain, the fourth power of a million (1 followed by 24 zeroes); in the U.S., the fifth power of a thousand (1 followed by 15 zeroes).