subordinating conjunction 
noun
A conjunction that introduces a subordinating clause, e.g. although, because. Contrasted with coordinating conjunction.Questions beginning with a subordinating conjunction or a relative pronoun are complete sentences....
- The independent clause must be connected to the dependent clause in a subordinating conjunction.
- You could also think of the subordinating conjunction as a prepositional phrase, and you always need a comma after a prepositional phrase that starts a sentence.
- period pain
- period piece
- periodus
- period–luminosity
- perioecic
- perioecid
- perioecus
- perioekid
- perioesophageal
- perioesophagitis
- perioikic
- perionychia
- peri-oophoritis
- perioperative
- perioperatively
- periophthalmic
- periople
- perioptic
- perioral
- periorbital
- periorbitis
- periorchitis
- periost
- periosteal
- periosteitis