sideroblast
Medical term for a nucleated red blood cell precursor with iron-containing granules visible after staining. Used in hematology and pathology contexts.
An increase in sideroblasts was observed in the bone marrow examination.
Compound of 鉄 (iron), 芽 (bud/sprout, here referring to an immature cell), and 球 (sphere/cell). The term is a direct translation of the English 'sideroblast'.