A·be·ce·da·ry n. A primer; the first principle or rudiment of anything. [R.]
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A·be·ce·da·ri·an, A·be·ce·da·ry a. Pertaining to, or formed by, the letters of the alphabet; alphabetic; hence, rudimentary.
Abecedarian psalms, hymns, etc., compositions in which (like the 119th psalm in Hebrew) distinct portions or verses commence with successive letters of the alphabet.