Definition of Consultant

Consultant: An individual to whom one refers for expert advice or services. The use of consultants is common in medicine.

For example, a man with puzzling pains in the joints of the hands and feet may be referred to a rheumatologist who acts as a consultant to help illuminate the nature of the pain.

For another example, a woman has a breast lump that is biopsied and the biopsy is read by the initial pathologist as suspicious but not definitely indicative of cancer. The biopsy material can be sent for a second opinion to another pathologist with special expertise in breast cancer; this pathologist serves as a consultant on the case.