from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various small, free-floating, stemless aquatic flowering plants of the genus Lemna, growing in close, often carpetlike colonies on the surface of quiet water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several reduced floating aquatic plants in the family Lemnaceae.
from the GNU version of the Collaborative International Dictionary of English
- n. A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food for ducks; -- called also duckmeat.
from The Century Dictionary and Cyclopedia
- n. Same as duck-meat.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds
Sorry, no etymologies found.
This company's workhorse is lemna, also known as duckweed-a tiny, aquatic clonal plant that doubles its biomass every 36 hours-and is skilled at making proteins that mammalian cells struggle, and often fail, to produce.
Rivers and lakes are filled with small-flowered a kind of duckweed [Lemnaceae] and the lake started to bloom.
PetroAlgae is attempting to commercialize an open pond "microcrop" technology (they are working with other small aquatic plants such as duckweed as well as algae.)
A sure sign that water is contaminated is "the parasitic plant known as the lemna gibba or green water lentil" -- it's a kind of duckweed -- "which grows in aquatic environments into which urban runoff is continually discharged.
Now the "capture heavy metals" part does worry me, especially if the intent is to use duckweed saturated with heavy metals to feed livestock intended for meat ...
We also have a third pump to move gray water from the underground tank in which it is collected into the greenhab, where it is filtered and processed by duckweed and water hyacinths until it is clean enough to use for flushing the toilet, as mentioned earlier.
Mason netted baby fish (fry), a tadpole, lots and lots of bugs, duckweed, and other things quite fascinating to a six year old.
The pond looks slimy and green with duckweed slithering under the big lily leaves.
It's good to touch the green, green duckweed of home.
REFRESHING BREAK: A boy cooled himself off in a river covered with duckweed in Jiaxing in Zhejiang Province.