A centrocyte generally refers to a B cell with a cleaved nucleus,[1] as may appear in e.g. follicular lymphoma[2].
It can also refer to a cell with a protoplasm that contains single and double granules of varying size stainable with hematoxylin, as seen in lesions of lichen planus,[1] or a nondividing, activated B cell that expresses membrane immunoglobulin.[1]