One of about 500 million needed to fill an Olympic swimming pool

Let's find possible answers to "One of about 500 million needed to fill an Olympic swimming pool" crossword clue. First of all, we will look for a few extra hints for this entry: One of about 500 million needed to fill an Olympic swimming pool. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.