What do you call "that" or "where"?

Question

For words that sit as placeholders for other words (and introduce subordinate clauses), is there a name?For example,>The quick brown fox __that__ jumped over the lazy dog.>The man __who__ killed the cyclops.What are these words called? (aside from "pronoun" or "demonstrative pronoun" for the case of terms like __this__ and __that__ [depending on usage])They basically function as placeholders for other clauses or nouns.

Answer 1

You might consider 'that' the beginning of an adjective clause and 'where', an adverb clause. An adjective clause is a subordinate clause that modifies a noun or pronoun: Sports enthusiasts who attend Wimbledon return yearly. Or, The city where I was born has been flooded would be considered an adverb clause. The words that introduce the clause such as who, whom, whose, that, which, where, or when are known as 'relative pronouns.' I hope this helps you.