Home › Words › S › sideroblastsideroblastsideroblast means an erythroblast with stainable iron granules in its cytoplasm seen in cases of sideroblastic anaemia.EtymologyFrom sidero- + -blast.nounAn erythroblast with stainable iron granules in its cytoplasm seen in cases of sideroblastic anaemia.Definitions & examples from Wiktionary (CC BY-SA 3.0).