According to the Food and Agriculture Organization of the United Nations, the average minimum daily energy requirement is about 1,800 kilocalories (7,500 kJ) per person.
U.S. National Library of Medicine(0.00 / 0 votes)Rate this definition: Diagnostic Imaging. Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy.
The definition of diagnostic is something related to the identification of a problem or disease. 1  An example of a diagnostic test is an emissions test on a car. 2  An example of diagnostic is a symptom that is characteristic of a particular disease and that helps doctors to recognize that illness.