an abnormal cell consisting of a large nucleus and small cytoplasm that was once thought to be an immature lymphocyte and is now associated with a type of leukaemia (lymphoblastic leukaemia)
Derived forms
lymphoblastic (ˌlɪmfəʊˈblæstɪk)
adjective
lymphoblast in American English
(ˈlɪmfoʊˌblæst)
noun
a primitive cell that is a precursor of a lymphocyte