not a particle :-- Þ̵ heó æt nýhstan nǽnigdǽl (nǽnigne dǽl, v. l.) leóhtes scíman geseón mihte ut ne minimam quidem lucis alicuius posset particulam uidere, Bd. 4, 10; Sch. 401, 10. Cf. sumdǽl; nǽnig-, nán-wiht.
Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "nǽnig-dǽl." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 645.