portic
This might be just a supplemental entry adding to an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
portic
III. add: n. Hí gesáwon án lang portic on ðám norðdǽle . . . on ðám eástdǽle wæs gesewen micel cyrce . . . Seó cyrce mid hire portice mihte fíf hund manna befón on hire rýmette, Hml. Th. i. 508, 9-14. v. eást-, hálig-portic.
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.