A metric unit of volume equal to the cubic millimeter (mm3) or microliter (μL). The lambda has been used in chemistry in measuring very small samples. The symbol is the lower case Greek letter lambda
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}