Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
academe, academia, academy, Academy (nn.)
All four of these words are in Standard use today: academe (pronounced AK-uh-DEEM or AK-uh-DEEM) and academia initially referred to the grove where Plato taught (The Academy was Plato’s). But both they and academy have come today to apply to a variety of metaphoric aspects of formal education. Typical uses distinguish the world of scholarship and formal, especially higher, education from the world of practical existence. Academy is frequently incorporated into the titles of secondary educational institutions, as well as into the names of the four American military service institutions.
