[Of doubtful origin; possibly an application of FLASH sb.2 13.] = FLASHING vbl. sb.2
1574–5. Jesus Coll. Accts., in Willis & Clark, Cambridge (1886), III. 611. Item to the Plummer one day for settinge in lead over the chappell on the north side of the steple where the flasshes were taken awaye.
1614–5. Trinity Coll. Accts., ibid. II. 488. Laying the leads after the masons, setting on flashes and sodering.
