Also known as a subordinate clause, a dependent clause is a phrase containing a noun and a verb which doesn't form a complete sentence by itself, needing the cover of a kindly main clause to give it meaning and orient it in the choppy waters of a modern sentence. It is usually introduced by a conjunction - [[subordinating conjunction, in fact.

See also

Plain English Anatomy™ Noun | Verb | Adjective | Adverb | Preposition | Conjunction | Latin | Germany | Flannel | Legal triplicate | Nominalisation | Murder your darlings