a. Worn or corroded by the action of water. Chiefly Geol.
1772. Edinburgh Advertiser, 9 Oct., 1/1. They [cairns] are made up of water-worn blue stones.
1815. Bakewell, Introd. Geol., 10. Water-worn fragments of primary and transition rocks are commonly found in many of the secondary rocks.
1829. J. Phillips, Geol. Yorks., 49. Fragments of chalk and flint which … are very little water-worn.
1859. R. F. Burton, Centr. Afr., in Jrnl. Geog. Soc., XXIX. 33. Bare coralline rocks, smooth and waterworn near the sea, rough and sharp inland.
1888. F. Hume, Mme. Midas, I. Prol. There was a smooth water-worn boulder on the beach.
