decomposability|diːkəmpəʊzəˈbɪlɪtɪ| Also -ibility. [f. next + -ity.] The quality or property of being decomposable. 1862Ansted Channel Isl. i. iv. (ed. 2) 64 A proof of the decomposability of the granite rock.1881Lockyer in NatureNo. 617. 397 This decomposibility of the terrestrial elements.