— etiologist , n.
/ee'tee ol"euh jee/ , n. , pl. etiologies .
1. Pathol.
a. the study of the causes of diseases.
b. the cause or origin of a disease.
2. the study of causation.
3. any study of causes, causation, or causality, as in philosophy, biology, or physics.
Also, aetiology .
[ 1545-55; aetiologia aitiología determining the cause of something, equiv. to aití ( a ) cause + -o- -O- + -logia -LOGY ]