Blood classification syst.
The crossword clue "Blood classification syst." is answered by ABO, a 3-letter entry. Used 23 times across 11 distinct years; most recently in 2015; first recorded in 1999. It appears in 5 publications in the xd corpus. Every figure on this page comes from the collection data itself.
The answer
ABO
3 letters. See every clue for this answer on the ABO answer page.
Used 23 times across 11 distinct years; most recently in 2015; first recorded in 1999. It appears in 5 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other clues for ABO
Every other clue in this collection answered by ABO, most used first.
- Blood-typing letters - used 94 times, most recently in 2025
- Blood-typing system - used 53 times, most recently in 2024
- Blood type letters - used 31 times, most recently in 2023
- Blood letters - used 28 times, most recently in 2019
- Blood classification letters - used 26 times, most recently in 2024
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.
- Hot blood - IRE, used 82 times
- Flesh and blood - KIN, used 52 times
- Boiling blood - IRE, used 27 times
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