vigintillionth
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vigintillionth — 1. adjective The ordinal form of the number vigintillion 2. noun a) The person or thing in the vigintillionth position. b) One of a vigintillion equal parts of a whole … Wiktionary
vigintillion — vigintillionth, adj. /vuy jin til yeuhn/, n., pl. vigintillions, (as after a numeral) vigintillion, adj. n. 1. a cardinal number represented in the U.S. by 1 followed by 63 zeros, and in Great Britain by 1 followed by 120 zeros. adj. 2. amounting … Universalium