aetiology (US also etiology)

n [U] 1 study of causes and reasons 原因论（对原因及成因的研究）. 2 (medicine 药) study of the causes of disease 病原学; 病因学: the aetiology of malaria 疟疾的病因研究.

aerial, aerie, aero-, aerobatic, aerobatics, aerobics, aerodrome, aerodynamic, aerodynamics, aeronautics, aeroplane, aerosol, aerospace, aesthete, aesthetic, aesthetically, aesthetically (US also es-), aestheticism, aesthetics, aesthetics (US also es-), afar, affability, affable, affably, affair, affect, affect to, affectation, affected, affecting moving or touching, affectingly, affection, affectionate, affiance, affidavit, affiliate, affiliation, affiliation order, affinity, affirm,