plasmablast

https://doi.org/10.1351/goldbook.13575
Highly proliferative cell that is a developmental intermediate between small B lymphocytes and immunoglobulin (Ig)-secreting mature plasma cells.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1230 [Terms] [Paper]