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One part in a quintillion
Answer for the clue "One part in a quintillion ", 13 letters:
quintillionth
Word definitions for quintillionth in dictionaries
WordNet
Word definitions in WordNet
n. one part in a quintillion [syn: one-quintillionth ]
Wiktionary
Word definitions in Wiktionary
a. The ordinal form of the number quintillion. n. 1 The person or thing in the quintillionth position. 2 One of a quintillion equal parts of a whole
Usage examples of quintillionth.
In this way the dilution of the original millionth of a grain of medicine contained in the grain of powder operated on is carried successively to the billionth, trillionth, quadrillionth, quintillionth, and very often much higher fractional divisions.