Blood system letters
The crossword clue "Blood system letters" is answered by ABO, a 3-letter entry. Used 14 times across 10 distinct years; most recently in 2021; first recorded in 2010. It appears in 5 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
ABO
3 letters. See every clue for this answer on the ABO answer page.
Used 14 times across 10 distinct years; most recently in 2021; first recorded in 2010. 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
- Blood classification syst. - used 23 times, most recently in 2015
- Blood classification system - used 19 times, most recently in 2021
- Blood-group letters - used 14 times, most recently in 2022
- Blood type system - used 13 times, most recently in 2020
- Blood-typing syst. - used 11 times, most recently in 2020
- Swedish name for Turku. - used 9 times, most recently in 1989
- Finnish port. - used 8 times, most recently in 1981
- Actress Olivia d'___ - used 7 times, most recently in 2014
- Australian native - used 7 times, most recently in 1980
- Blood drive letters - used 7 times, most recently in 2024
- Blood group system - used 7 times, most recently in 2015
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
- Alias letters - AKA, used 146 times
- Battleship letters - USS, used 124 times
Search the clue collection
Search by clue words or by answer, or type a pattern with the letters you have and a blank for each square you do not know. The characters _ ? . and - all work as blanks.