: the basic system of antigens of human blood behaving in heredity as an allelic unit to produce any of the ABO blood groups

Word History

First Known Use

1938, in the meaning defined above

Time Traveler
The first known use of ABO system was in 1938

Dictionary Entries Near ABO system

Cite this Entry

“ABO system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ABO%20system. Accessed 30 Nov. 2022.

Medical Definition

: the basic system of antigens of human blood behaving in heredity as an allelic unit to produce any of the ABO blood groups
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