What is called in grammar?

Apostrophe, Quotation Marks and Ellipses. The final three punctuation forms in English grammar are the apostrophe, quotation marks and ellipses. ... An apostrophe (') is used to indicate the omission of a letter or letters from a word, the possessive case, or the plurals of lowercase letters. read more

In linguistics, grammar (from Greek: γραμματική) is the set of structural rules governing the composition of clauses, phrases, and words in any given natural language. The term refers also to the study of such rules, and this field includes phonology, morphology, and syntax, often complemented by phonetics, semantics, and pragmatics. read more