| Answer | Crossword Clue |
|---|---|
| NANO | Billionth (prefix) |
| NANO | Billionth: Prefix |
| NANO | "Billionth" prefix |
| NANO | Billionth: prefix |
| NANO | Prefix meaning "billionth" |
| NANO | One billionth: prefix |
| NANO | Prefix for "billionth" |
| NANO | One-billionth: Prefix |
| NANO | One billionth: Prefix |
| NANO | Prefix meaning one-billionth |
| NANO | Prefix meaning "one billionth" |
| NANO | Prefix meaning "one-billionth" |
| NANO | Prefix for a billionth |
