þider
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.
þider
I. AddÐá hét hé hí bídan on þám eálande, ... and hé ðider heora þearfe forgeaf, Bd. 1. 25; Sch. 53, 2. Hit gebyreð rihtor intó West-Sexan; þyder hý scylan gafol syllan, Ll. Th. i. 356, 19. II. AddFar nú þider þe (swá hwider swá, v.l. ) þú wille, Gr. D. 25, 1.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.