Grammar

Grammar is the study of the rules governing the use of a given natural language, and, as such, is a field of linguistics. Traditionally, grammar included morphology and syntax; in modern linguistics these subfields are complemented by phonetics, phonology, semantics, and pragmatics. Each language has its own distinct grammar. "English grammar" (uncountable) refers to the rules of the English language itself, while "an English grammar" (countable) refers to a specific study or analysis of these rules. A fully explicit grammar exhaustively describing the grammatical constructions of a language is called a descriptive grammar. Specific types of grammars, or approaches to constructing them, are known as grammatical frameworks. The standard framework of generative grammar is the transformational grammar model developed by Noam Chomsky in the 1950s to 1980s.
A reference book that attempts a comprehensive description of the grammar of a language may be called "a grammar" or "a reference grammar". Ref http://en.wikipedia.org/wiki/Grammar