blanca
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.
blanca
Add:: a steed Þá hét hé on ðæs pápan ciericean gestællan his blancan and monig óðer neát, Shrn. 51, 22. v. blonca in Dict.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.