, an; f. Early or morning mass, first mass; prima vel matutinalis missa :-- We sungon capitol-mæssan cantavimus primam missam, Coll. Monast. Th. 33, 29.
Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "capitol-mæsse." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 145.