FRACTITIUM

\fɹaktˈɪti͡əm], \fɹaktˈɪti‍əm], \f_ɹ_a_k_t_ˈɪ_t_iə_m]\
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1910 - Black's Law Dictionary (2nd edition)
By Henry Campbell Black

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abo group

  • a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are and B AB O
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