Sentence:  In Viking Man's apartment, a large closet he's made into a movie library is strewn with reels of film. The reels have spooled into a <WSD>sargasso</WSD> of celluloid; a projector stares from the end of the closet. 
Meaning of the word marked with <WSD> tags:  "Also" '''(Sargasso)''': a confused, tangled mass or situation.