I. ˌā-bē-(ˌ)sē-ˈder-ē-ən noun
Etymology: Middle English abecedary, from Medieval Latin abecedarium alphabet, from Late Latin, neuter of abecedarius of the alphabet, from the letters a + b + c + d
Date: 1603
: one learning the rudiments of something (as the alphabet)
II. adjective
Date: 1665
1.
a. : of or relating to the alphabet
b. : alphabetically arranged
2. : rudimentary