Read desitionis (from desino) not decisionis. This accidens desitionis may after all perhaps be no other than the forma cadaverica, supposed by some school men to replace the soul as the 'form' of the body after death. These 'Moors' (Arabian commentators on Aristotle) evidently were in possession of the atomic theory of Leucippus and Democritus, a theory embraced by Epicureans, but no favourite with Aristotelians.

Of God and His Creatures: 3.65