（ru^pa-skandha）. The 'aggregate of form.' The gathering of materiality. The cluster of material existence. One of the five skandhas. It refers to material existence as opposed to mental functions as the other four skandhas do. In Abhidharmako/sa theory this category consists of the eleven elements of the five sense organs， their five objects and unmanifest form. In Yoga^ca^ra theory， there are also eleven elements in this category， including the five sense organs， the five faculties and subtle form.