Wiktionary
absey
n. 1 (context obsolete English) ABC; alphabet. (First attested around 1150 to 1350.)(R:SOED5: page=9) 2 (context obsolete English) absey book; abecedary. (First attested around 1150 to 1350.) 3 (context obsolete English) An alphabetical acrostic list. (First attested around 1150 to 1350.)