Webster's Revised Unabridged Dictionary · 1913

Abecedarian

Abecedarian ({not transcribed}) , noun

[Latin abecedarius. A word from the first four letters of the alphabet.]

1.
One who is learning the alphabet; hence, a tyro.
2.
One engaged in teaching the alphabet. — Wood

Abecedarian ({not transcribed}) , adjective

Pertaining to, or formed by, the letters of the alphabet; alphabetic; hence, rudimentary.
Collocations (1)
Abecedarian psalms or hymns , etc., compositions in which (like the 119th psalm in Hebrew) distinct portions or verses commence with successive letters of the alphabet. — Hook

Also: Abecedary