|1.||of, relating to, or occurring during the early phases of a disease before accurate diagnosis is possible|
|2.||of, relating to, or designating an early period of scientific study by a medical student before practical experience with patients|
preclinical pre·clin·i·cal (prē-klĭn'ĭ-kəl)
Of or relating to the period of a disease before the appearance of symptoms.
Of or being a period in medical education before the student is involved with patients and clinical work.