blōd-seax, n.n: a blood-knife, a lancet. (BLOAD-say-aks)

Surgeon removes ‘fungus’ (possibly a polyp) from patient’s nose in a 12th-century medical miscellany. Oxford, Bodleian Library, Ashmole 1462, f. 10r. The MacKinney Collection of Medieval Medical Illustrations. [dc.lib.unc.edu]