Clue: Blood typing system

Answer: ABO

Length: 3

---

Similar Clues:

• _____ system (blood typing) (ABO with 3 letters)
• ____ system: blood-typing scheme (ABO with 3 letters)
• ___ system (blood typing) (ABO with 3 letters)
• Blood-typing system (ABO with 3 letters)
• Blood typing letters (ABO with 3 letters)
• Blood gp. system (ABO with 3 letters)
• Blood system letters (ABO with 3 letters)
• Typing system (ABO with 3 letters)
• Blood typing, e.g. (LABTEST with 7 letters)
• Blood-typing abbr. (NEG with 3 letters)