Luminescence Error: philatelic term for a deviation caused by a luminescence error
Missing Fluorescence: postage stampe caused by an error without fluorescence
Missing Phosphorus Overprint: postage stamp caused by an error without phosphorus overprint
Missing Phosphorus Bar: postage stamp caused by an error without phosphorus bar overprint
Double Phosphorus Bar: postage stamp caused by an error twice overprinted with a phosphorus bar