aetiologue
/ˌætɪˈɒlədʒ/Definitions
1. noun
A writer or compiler of etiological accounts.
“The aetiologue of the ancient mythological texts meticulously researched the origins of the stories.”
2. noun
A person who investigates the causes of diseases or disorders.
“The aetiologue studied the medical records to identify the underlying causes of the outbreak.”