The most immature blood cell that is considered a plasma cell instead of a B cell is the plasmablast. Plasmablasts secrete more antibodies than B cells, but less than plasma cells.
Gentian Violet. Gentian violet is a water soluble dye (coloring substance) used primarily in medicine to stain bacteria, but also in other histological procedures. It is not derived from gentians, but got its name since it is pink-violet like some gentians in the genera of Centaurium, Gentiana, and Gentianella.
Violet and purple look very similar; but violet is a true color, with its own set of wavelengths on the spectrum of visible light, while purple is a composite color, made by combining blue and red. In history, violet and purple have long been associated with royalty and majesty.