local. [f. next.] = CALLOW sb. 3.
1787. W. H. Marshall, Norfolk (1795), I. 151. The depth of uncallow is generally very unequal. Ibid., II. Gloss., Uncallow, the earth which covers a jam of marl.
1841. Civil Eng. & Arch. Jrnl., IV. 341/2. To the above must be added the expenses for removing the uncallow.
1871. J. Phillips, Geol. Oxf. & Vall. Thames, 471. Thick bed of Uncallow, consisting of gravel, brickearth, loam, and sand, in horizontal, curved, and aggregated masses.