Relating to or characteristic of a cyclopedia; having the nature of an encyclopedia.
From 'cyclopedia' with the suffix '-ical,' an alternative adjectival form similar to 'cyclopedic.' Both forms emerged around the same time with essentially the same meaning.
'Cyclopedical' and 'cyclopedic' are twins in meaning, but 'cyclopedical' sounds more formal and old-fashioned, which is why you'd encounter it in Victorian-era texts but rarely hear it today.
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