Full Idea
Every extended material substance is composed of substantial parts distant from one another in place or location.
Gist of Idea
Every extended material substance is composed of parts distant from one another
Source
William of Ockham (Tractatus de corpore Christi [1323], Ch. 12)
Book Reference
Pasnau,Robert: 'Metaphysical Themes 1274-1671' [OUP 2011], p.289
A Reaction
Pasnau glosses this as that 'bodies have corpuscular structure', meaning that they are made up of parts of matter (rather than just enformed matter, I think).