Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "dǽl-nimend." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 146.
, -nymend, -neomend, es; m. [nimende, part. of niman to take]. I.a taker of a part, a sharer, partaker, participator; partĭceps :-- Ðæt se Hǽlend dǽlnimend wǽre úre deádlícnysse that the Saviour was a partaker of our mortality, Homl. Th. i. 36, 33. Se níþfulla is ðæra deófla dǽlnimend the envious is a participator with devils, i. 606, 5. Ic eom dǽlneomend ðe heom ondrǽdaþ ðé particeps ego sum omnium timentium te, Ps. Th. 118, 63.