what something is made up of or how it is put together.
—9th ACC Volume 1 Approved Glossary, —9th ACC Volume 2 Approved Glossary, —9th ACC Volume 3 Approved Glossary, —Academy Level I Glossary - Approved November 1990, —PDC 2 Approved Glossary, —PDC Volume 1 Approved Glossary, —The Anatomy of the Human Mind Glossary