1) Diagnosing 2) Diagnosis 3) Presymptomatic 1) Presymptomatic 
before a disease becomes clinically recognizable.
1. Before a disease becomes clinically recognisable. ... 2. <pharmacology> Refers to the testing of experimental drug the test tube or in animals before clinical trials in humans may be carried out. ... (10 Oct 1997) ... 
(pre-klin´ĭ-kәl) before a disease becomes clinically recognizable.
Type: Term Pronunciation: prē-klin′i-kăl Definitions: 1. Before the onset of disease. 2. A period in medical education before the student becomes involved with patients and clinical work.
Generally refers to research that has been done before a compound is tried on humans, i.e. in vitro and animal studies
[adj] - of or relating to the early phases of a disease when accurate diagnosis is not possible because symptoms of the disease have not yet appeared
preclinical Before a disease becomes clinically recognizable.
presymptomatic adjective of or relating to the early phases of a disease when accurate diagnosis is not possible because symptoms of the disease have not yet appeared
of or pertaining to the period prior to the appearance of the symptoms.