Relating to or based on the study of word origins and their historical meanings.
From Medieval Latin etymologicus, from Greek etymologikos. The term has been used since at least the 16th century to describe anything related to etymology or the study of word roots.
The adjective etymologic is the formal, scholarly way to say 'relating to word origins'—it sounds more serious than just saying 'about etymology,' which is why you'll find it in academic papers.
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