Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of various submerged or floating aquatic plants of the genus Potamogeton, having inconspicuous flowers borne in small spikes.

from The Century Dictionary.

  • noun An aquatic herb of the genus Potamogeton, found in numerous Species in both he mispheres.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Bot.) Any aquatic plant of the genus Potamogeton, of which many species are found in ponds or slow-moving rivers.
  • noun an American water weed (Anarcharis Canadensis, syn. Elodea Canadensis.) See Anacharis.
  • noun the Zannichellia palustris, a slender, branching aquatic plant, having pointed nutlets.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any plant of the genus Potamogeton, that grows in ponds or similar aquatic conditions; extended to other similar plants.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun submerged freshwater perennials
  • noun any of several submerged or floating freshwater perennial aquatic weeds belonging to the family Potamogetonaceae

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

pond +‎ weed

Examples

  • Once we've fought and lost a losing battle with the pondweed, we spy some pennywort, a weed that sits underneath the water and requires us to go at it repeatedly, using the arm of the conveyer belt to detach it from reeds and scoop it up on to the belt.

    A working life: the lock keeper

  • On the way back to Bow Locks, the areas cleared of pondweed are covered once again.

    A working life: the lock keeper

  • And she heads off once again to attack that pondweed.

    A working life: the lock keeper

  • Sheltered from the wind yet exposed to the sun throughout the day, it makes its way past numerous small pools, their surfaces bearing a scattering of pondweed leaves and their low banks fringed with clumps of reed.

    Country diary: South Uist

  • We track the pondweed most of the way north from Bow Lock to Old Ford, as the Olympic Stadium rises into view to our right.

    A working life: the lock keeper

  • On the morning I arrive, pondweed has once again drifted menacingly back to the canal – no matter how often Myers and her colleagues remove the plant, it returns, often within hours, at the height of the weed season.

    A working life: the lock keeper

  • Towards the middle of the pond, a sudden upwelling from below, like a huge burp, causes a floating pondweed leaf to billow then sink back down again.

    Country diary: Sandy, Bedfordshire

  • But my doubts have been happily confounded. artw took us all to the local pond shop on Sunday, and bought some pondweed and a bonus pond snail.

    Tadpoles

  • He pulls the man, whose face is covered in panic and pondweed, out of the water.

    The Redleys

  • He pulls the man, whose face is covered in panic and pondweed, out of the water.

    The Redleys

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