See Also: ultramicro-(dictionary)

ultramicro- (iou)



ultramicro- prefix. Also as attrib. adjective ultramicro. M20.
[from ULTRA- + MICRO-.]
Chemistry. Designating or pertaining to chemical analysis or research involving very minute quantities (of the order of a few micrograms or less), as ultramicroanalysis, ultramicrochemical adjective, ultramicro method, etc.