A late basophilic metamyelocyte in which the nucleus is in the form of a curved or coiled band, not having acquired the typical multilobar shape of the mature basophil. [ http://www.ncbi.nlm.nih.gov/pubmed/18466030 http://www.cap.org GOC:add http://openisbn.com/search.php?q=0721601464&isbn=1/ ]