the theory that every physical object is composed of two principles, an unchanging prime matter and a form deprived of actuality with every substantial change of the object.
Origin of hylomorphism
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the philosophical doctrine that identifies matter with the first cause of the universe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012