NOUN (2)

1. a novice learning the rudiments of some subject;

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


ADJECTIVE (1)

1. alphabetically arranged (as for beginning readers);

The Collaborative International Dictionary of English v.0.48:

Abecedarian \A`be*ce*da"ri*an\, n. [L. abecedarius. A word from
   the first four letters of the alphabet.]
   1. One who is learning the alphabet; hence, a tyro.
      [1913 Webster]

   2. One engaged in teaching the alphabet. --Wood.
      [1913 Webster] Abecedarian

The Collaborative International Dictionary of English v.0.48:

Abecedarian \A`be*ce*da"ri*an\, Abecedary \A`be*ce"da*ry\, a.
   Pertaining to, or formed by, the letters of the alphabet;
   alphabetic; hence, rudimentary.
   [1913 Webster]

   Abecedarian psalms, hymns, etc., compositions in which
      (like the 119th psalm in Hebrew) distinct portions or
      verses commence with successive letters of the alphabet.
      --Hook.
      [1913 Webster]

WordNet (r) 3.0 (2006):

abecedarian
    adj 1: alphabetically arranged (as for beginning readers)
    n 1: a novice learning the rudiments of some subject
    2: a 16th century sect of Anabaptists centered in Germany who
       had an absolute disdain for human knowledge