1573 Like as a rocke that from a loftie mount doth headlonge fall, Enforst with rage of wind, or els with shoures, and water gall. 466[…] 1824 There is also often seen a fainter coloured bow, commonly called a water-gall, above the Rainbow. of Calif.) 63 1925 I saw yon antrin thing A watergaw wi’ its chitterin’ licht. There’s a page of weather words in Wilson which has yow trummle, watergaw etc. Alas, the Scottish Chapbook does not appear to have been digitized, but you can see the contents of Vol.