Abhidhamma

Abhidharma (Sanskrit) or Abhidhamma (Pāli) is a category of Buddhist scriptures that attempts to use Buddhist teachings to create a systematic, abstract description of all worldly phenomena. The Abhidharma represents a generalization and reorganization of the doctrines presented piecemeal in the narrative sūtra tradition.
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Abhidhamma (Pali) [from abhi towards, with intensified meaning + dhamma law, religion, duty from the verbal root dhri to hold fast, preserve, sustain] The supreme dhamma or law as expounded in the third and last portion of the Pali Tipitaka (Sanskrit Tripitaka) or "three baskets" of the canonical books of the Southern School of Buddhism. The Abhidamma-pitaka, which deals with profound metaphysical themes, is believed to be the source from which the Mahayana and Hinayana got their fundamental doctrines.
Abhidamma (Sanskrit abhidharma) is defined by Buddhaghosha as "that higher law (dharma) which goes beyond (abhi) the popular or common law."