Meaning

noun a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specia

originEtymology tree Proto-Indo-European *h₁én Ancient Greek ἐν (en) Ancient Greek ἐν- (en-) Proto-Indo-European *kʷel- Proto-Indo-European *kʷékʷlos Ancient Greek κύκλος (kúklos) Proto-Indo-European *-yósder. Ancient Greek -ῐος (-ĭos) Ancient Greek ἐγκύκλῐος (enkúklĭos) Proto-Indo-European *peh₂w-der. Proto-Hellenic *pā́wits Ancient Greek παῖς (paîs) Ancient Greek -εύς (-eús) Ancient Greek -εύω (-eúō)…

Etymology from Wiktionary, CC BY-SA 3.0