, es; m. [basu purple, stán stone] A topaz, a precious stone varying from a yellow to a violet colour; topazium :-- Ofer gold and ðone baswon stán [ = baswan stán] super aurum et topazion, Ps. Spl. 118, 127.
Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "baswa stán." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 68.