Minor Clauses—Clauses other than the principal clause or main statement of a sentence.
Parenthetical—Incidental; not an essential part of a sentence or statement.
Particle—One of the minor parts of speech not inflected, that is, not undergoing changes in form.
Phrase—An expression consisting usually of but a few words, denoting a single idea, or forming a separate part of a sentence.
Relative Clause—A clause joined to the rest of the sentence by a relative pronoun.
Salutation—A form of greeting, especially at the beginning or end of a letter.
Salutatory Phrase—The words forming a salutation, or greeting.