What is another word for restrictive relative clause?
Pronunciation: [ɹɪstɹˈɪktɪv ɹˈɛlətˌɪv klˈɔːz] (IPA) 
A restrictive relative clause is a type of clause that provides essential information about a noun or pronoun, and thus cannot be omitted without altering the meaning of the sentence. There are several synonyms for this term, such as defining clause, essential clause, and identifying clause. These clauses are used to limit the meaning of a noun or pronoun by specifying its identity, characteristics, or attributes. A defining clause typically follows immediately after the noun or pronoun it modifies, and is usually introduced by words like who, whom, whose, that, and which. Essential clauses are essential because they are necessary to understand the sentence, unlike non-essential clauses, which provide additional, non-essential information.
