the GNU version of the Collaborative International Dictionary of English
n. A primer; the first principle or rudiment of anything.
The Century Dictionary and Cyclopedia
Same as abecedarian.
n. An a-b-c book; a primer.
n. A first principle or element; rudiment: as, “such rudiments or abecedaries,”
Word Usage
"For example, one of the stories "From 'Abecediarya'" (it's actually an excerpt from an upcoming novel) by Adam David is best described as a narrative that follows an abecedary format."