Source:http://linkedlifedata.com/resource/umls/id/C1321095
NCI: A unit of volume used in pharmacy and equal to 0.05 milliliter (20 drops/ml).,NCI: A unit of measure of volume defined as the amount of liquid dispensed as one drop from a dropper dispenser. The volume of a drop depends on the physical properties of the liquid dispensed, the dispenser device, and the technique used to produce the drop.,HL7V3.0: <p>1 ml/12</p>