bacan
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
bacan
AddÞú erast and sǽwst; þú grinst and bæcst, Hml. Th. i. 488, 25. Sé þe him hláf baceð, Wlfst. 212, 27. In þám ofne þá wíf bócon heora hláfas, Gr. D. 251, 26. Þæt man breád bace, Wlfst. 296, 8. Þá oflǽtan þe gé sylfe bacen, Ll. Th. ii. 404, 35. Hláf bacan panes coquere, 160, 26. Ofen wæs gegearwod tó þon man wolde on bacan, Gr. D. 219, 12. v. asc-, eald-, ele-, ge-, heorþ-bacen.
This is a supplementary entry with editorial changes to an entry in the main volume of the dictionary. Look under the 'Possibly connected entries' below, or for the same headword in the list to the left.

A Combined List of Abbreviations.

Abbreviation not recognized. See:

A Combined List of Abbreviations.