‖ microcythæmiaPath.|maɪkrəʊsɪˈθiːmɪə| [mod.L. f.prec. + Gr. αἷµα blood.] The condition of the blood when it contains many microcytes. 1876tr.Wagner's Gen.Pathol. 518 Microcythæmia is the name given..to a disease..characterized by the appearance in the blood of..microcytes.