Quintillion, in metric prefixes WSJ Crossword Clue

By Narcissa Kh /

Crossword Answer

1 ? E
2 ? X
3 ? A
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      Hint 1

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      Think of something extremely large, beyond trillions and quadrillions.

      Hint 2

      meaning
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      ??? is a metric prefix denoting a factor of 10^18.

      Hint 3

      explanation
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      The clue refers to the metric prefix for a quintillion, which is 10^18. In the International System of Units (SI), the prefix '???-' represents this power of ten.

      Clue Analysis

      The clue “Quintillion, in metric prefixes” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated January 16 2026, the definitive 3-letter answer is: EXA.

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      Quintillion, in metric prefixes Crossword Clue