Source:http://linkedlifedata.com/resource/umls/id/C0180552
UMD: Hollow tubes, open at both ends, with an aspiration bulb attached to one end, intended for aspirating and dispensing a small volume of liquid in single drops. Droppers are usually made of glass or plastic.,NCI: A pipet consisting of a small tube with a vacuum bulb at one end for drawing liquid in and releasing it a drop at a time.