dagung
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.
dagung
Add: crepusculum Hwæðer hit sí þe ǽfenglommung ðe on morgen d(e)agung (e written above; dagung, v. l.) utrum crepusculum adhuc permaneat uespertinum, an jam advenerit matutinum, Bd. 1, 1; Sch. 9, 21. Ǽr þæs uppcumendan leóhtes dagunge ante exsurgentis lucis crepusculum, Gr. D. 84, 29. [v. N. E. D. dawing.]
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.