Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A floating mass of vegetation that often obstructs navigation in tropical rivers.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A floating mass of plant matter, such as reeds, which obstructs boat passage on the Nile

from the GNU version of the Collaborative International Dictionary of English

  • n. A tangled mass of floating vegetal matter obstructing navigation.

from The Century Dictionary and Cyclopedia

  • n. An impenetrable mass of floating water-plants interlaced with trunks of trees and decayed vegetable matter, forming floating islands in the White Nile.
  • n. See sadd.

Etymologies

Arabic, obstruction, sudd, from sadda, to obstruct; see šdd in Semitic roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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