An alternative spelling of etiologist; a person who studies the causes of diseases or conditions.
From Greek 'aitia' (cause) + 'logos' (study), using the French '-ogue' suffix. This variant spelling reflects the older Anglicization of Greek scientific terms.
The '-ogue' ending (like in 'dialogue' and 'prologue') shows how English borrowed scientific terminology through French, creating two legitimate spellings for the same expert.
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