Air pump letters
The crossword clue "Air pump letters" is answered by PSI, a 3-letter entry. Used 33 times across 15 distinct years; most recently in 2024; first recorded in 2000. It appears in 6 publications in the xd corpus. Every figure on this page comes from the collection data itself.
The answer
PSI
3 letters. See every clue for this answer on the PSI answer page.
Used 33 times across 15 distinct years; most recently in 2024; first recorded in 2000. It appears in 6 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other clues for PSI
Every other clue in this collection answered by PSI, most used first.
- Letter before omega - used 132 times, most recently in 2026
- Omega preceder - used 110 times, most recently in 2025
- Chi follower - used 64 times, most recently in 2026
- Trident-shaped Greek letter - used 58 times, most recently in 2026
- Trident-shaped letter - used 57 times, most recently in 2026
- Penultimate Greek letter - used 48 times, most recently in 2026
- Pressure meas. - used 47 times, most recently in 2026
- 23rd Greek letter - used 36 times, most recently in 2026
- Letter after chi - used 35 times, most recently in 2026
- Pitchfork-shaped letter - used 29 times, most recently in 2026
- Tire pressure meas. - used 28 times, most recently in 2026
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Genetic letters - RNA, used 265 times
- Debtor's letters - IOU, used 249 times
- Explosive letters - TNT, used 225 times
- Letters before an alias - AKA, used 194 times
- Clean air org. - EPA, used 187 times
- Alias letters - AKA, used 146 times
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