 Micropædia

The 12-volume Micropædia is one of the three parts of the 15th edition of "Encyclopædia Britannica", the other two being the one-volume "Propædia" and the 17-volume "Macropædia".The name "Micropædia" is a neologism coined by Mortimer J. Adler from the ancient Greek words for "small" and "instruction"; the best English translation is perhaps "brief lessons".