Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: aetiologia, from Greek aitia 'cause'

etiology

 noun
     
Related topics: Illness and Disability
et‧i‧ol‧o‧gy [uncountable and countable]
technicalMI the cause of a disease or the scientific study of this
—etiological adjective
—etiologically adverb
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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