, es; m. n [?] The clear, serene sky; serenum :-- Under heofenes hádor under heaven's serene, Beo. Th. 832; B. 416. [Cf. O. H. Ger. heiteri serenum : Icel. heið the brightness of the sky.] Cf. rodor, and see hádor; adj.
Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "hádor." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 498.