It may not have been reviewed by professional editors see full disclaimer donation to Wikimedia.An Encyclopedia or lexicon is a type of reference work or collection that contains a comprehensive summary of information from either all branches of Knowledge or a specific branch of knowledge. Important sub-fields of academic philosophy include metaphysics epistemology ethics aesthetics political philosophy logic theory of science since the 20th. century professional philosophists contribute to society primarily as professors researchers and writers. It was in the sense that Aristotle used the word in his ancestor words attuned early in Homeric hymns Heraklediska the Athenian efebes Ed and in the boiotic inscriptions. With the Renaissance the older mind of the word was revived and it was in the Greek sense that Francis Bacon used the term in the sixteenth century. It may not have been reviewed by professional editors see full disclaimer Donate to Wikimedia.An encyclopedia or encyclopaedia is a type of reference work or compendium holding a comprehensive summary of information from either all branches of knowledge or a particular branch of knowledge.Major sub-fields of academic philosophy include metaphysics epistemology ethics aesthetics political philosophy logic philosophy of science since the 20th century professional philosophers contribute to society primarily as professors researchers and writers.It was in that sense that Aristotle used the word in his the ancestor word is attested early on in Homeric Hymns Heraclitus the Athenian ephebes oath and in Boiotic inscriptions.With the Renaissance older senses of the word were revived and it was in the Greek sense that Francis Bacon used the term in the sixteenth century.