thousandth

adj

1. (not-comparable)The ordinal numeral form of one thousand; last in order of a series of a thousand; next after the nine hundred and ninety-ninth.

noun

1. (singular, singular-only)The person or thing in the thousandth position.
2. One of a thousand equal parts of a whole.

   ““Ah, Alan,” murmured Dorian, with a sigh, “I wish you had a thousandth part of the pity for me that I have for you.””

   “We humans are so stuck in the middle of the cosmic scales — in average height, one-hundredth of one-septillionth (10^-24) the size of the observable universe, and with typical life spans of a couple octillion attoseconds. And an attosecond is an eternity compared with the lifetime of the elusive Higgs boson, a subatomic particle that exists for one-thousandth of an attosecond before decaying.”