|—n , pl -mata|
|1.||a plan, diagram, or scheme|
|2.||(in the philosophy of Kant) a rule or principle that enables the understanding to apply its categories and unify experience: universal succession is the schema of causality|
|3.||psychol a mental model of aspects of the world or of the self that is structured in such a way as to facilitate the processes of cognition and perception|
|4.||logic an expression using metavariables that may be replaced by object language expressions to yield a well-formed formula. Thus A = A is an axiom schema for identity, representing the infinite number of axioms, x = x, y = y, z = z, etc|
|[C19: from Greek: form]|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
schema sche·ma (skē'mə)
n. pl. sche·mas or sche·ma·ta (skē-mä'tə, skĭ-māt'ə)
A diagrammatic representation; an outline or a model.
A pattern imposed on complex reality or experience to assist in explaining it, mediate perception, or guide response.