It means harder, dedicated to Harder or Harderiana (by the Swiss anatomist and naturalist Johann Jacob Harder). In Zoology is the name of a gland, also known as harderiana or Harder gland. New lacrimal excretory gland. It is located behind the eye socket of many animals. It occurs in animals that have a nictitating membrane or third eyelid. It serves to regulate vision, protect the eyes, to lubricate them and as an immune response of birds. It does not exist in humans or most apes.
