a. [f. CLEAVE v.1 + -ABLE.] That can be cloven, cleft or split; admitting of cleavage.

1

1846.  Worcester cites Penny Cycl.

2

1856.  Ruskin, Mod. Paint., IV. V. xviii. § 3. In large rocks the cleavable or frangible nature was the thing that necessarily struck him most.

3

1881.  Geikie, Wyoming, in Macm. Mag., XLIV. 234. Pink cleavable orthoclase felspar.

4