What a word! A new one to me! "Where is my etymologicon?" sounds like a musical instrument! "I've got a dose of etymologicon. The doctor says I should stay in bed for a few days." "Etymologicons were common in the Mesozoic but are now extinct!" I'm talking rubbish, of course.

I’ve never seen the word before. The first part ‘etymo’ seems like the Greek word or root for word origins…’logicon’ feels made up. Could mean an icon representing the root of a word. Or a literary device indicating the root of a word. The context might help. Where did you see or hear it?

Yes I am reading the book: The Etymologicon