Term Name:	immature B cell
Synonyms:	immature B lymphocyte, immature B-cell, immature B-lymphocyte, newly formed B cell
Definition:	An immature B cell is a B cell that has the phenotype surface IgM-positive and surface IgD-negative, and have not undergone class immunoglobulin class switching or peripheral encounter with antigen and activation.
Ontology:	Cell Ontology [CL:0000816]