sargasso

noun3

1. •
   A brown alga, of the genus Sargassum, that forms large, floating masses.

   • SARGASSO, the Sea-Lentile. — 1721
2. •
   A part of an ocean or sea characterized by floating masses of sargassos, like the Sargasso Sea.
3. •
   (figurative) Also Sargasso: a confused, tangled mass or situation.

   • His [Philip K. Dick's] ideas provide diegetic anchors for digitally oriented directors [...] whose works might otherwise float off into a Sargasso of insignificance. — 2005