赤せき芽が球きゅうせきがきゅうMeanings1nounerythroblastMedical term for an immature, nucleated red blood cell. Used in hematology and related fields.See also: 赤血球赤せき芽が球きゅうは骨こつ髄ずいで赤せっ血けっ球きゅうに成せい熟じゅくする。Erythroblasts mature into red blood cells in the bone marrow.