Dropper/ˈdrɑːpər/ Definition 1 of 3Pro Tip 1/3Precise Application Droppers are used when you need to add small, precise amounts of liquid without spills. Add two drops of food coloring with a dropper. Pro Tip 2/3Laboratory Use Droppers are common in scientific settings for experiments due to their accuracy. Fill the dropper with titration liquid in the laboratory. Pro Tip 3/3Medical Dosage Medicine droppers help administer drugs in liquid form, especially for babies. Use the dropper to give the baby her medication.