Blood-typing letters
The crossword clue "Blood-typing letters" is answered by ABO, a 3-letter entry. Used 94 times across 26 distinct years; most recently in 2025. It appears in 25 publications in the xd corpus. Every figure on this page comes from the pilot data itself.
The answer
ABO
3 letters. See every clue for this answer on the ABO answer page.
Used 94 times across 26 distinct years; most recently in 2025. It appears in 25 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Related clues
Pilot clues 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
- Alias letters - AKA, used 146 times
- Battleship letters - USS, used 124 times
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