Population of small diploid epithelial cells in Dipteran larvae that do not form typical imaginal discs, yet resemble them in some ways. ... (18 Nov 1997) ... 
(his´to-blast) a tissue-forming cell.
Type: Term Pronunciation: his′tō-blast Synonyms: histioblast
histoblast 1. A cell or group of cells capable of forming tissue. 2. One of the precursor cells that give rise to the tissues of the body; usually in the embryo and fetus, but also later in life.
a cell or group of cells capable of forming tissue.