Meaning

noun a novice learning the rudiments of some subject

noun a 16th century sect of Anabaptists centered in Germany who had an absolute disdain for human knowledge

adjective alphabetically arranged (as for beginning readers)

originFrom Late Latin abecedarius (from the first four letters of the Latin alphabet + -arius). Equivalent to abecedary + -an. Compare abecedary.

Etymology from Wiktionary, CC BY-SA 3.0