† ˈbotemayObs.rare. [Some kind of corrupted form of bitumen: cf.It.bitume.] Bitumen. c1300K. Alis. 4763 Pilers of brass and botemeys.Ibid. 6189 Above, and byneothe, is heore heolyng, With botemay, that wol clyng, That no water, salt no cler, Heom to derye hath no power.