This might be just a supplemental entry adding to an entry in the Main Volume.
ymbhygdig-lic
.Add :-- Mid tý þe þis wæs gehealden for þám gewunan þæs ymbhýdiglican regoles cum hoc de usu regulae sollicite (sollicitae has been read) servaretur, Gr. D. 126, 21.
Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "ymbhygdig-lic." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 753.