| 单词 | duckweed |
| 释义 | duckweed (once / 77251 pages) n WORD FAMILY duckweed: duckweeds USAGE EXAMPLESHuge blooms of noxious duckweed look, from above, like pea-green wigs spread out in the sun. The New Yorker(Nov 06, 2016) Duckweed and watermeal are just two types of weeds that most pond owners seek to control with chemicals such as diquat. National Geographic(Jun 17, 2016) The company takes duckweed from water and turns it into fuel to sell to refiners and farmers. Washington Times(Feb 18, 2016) n any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds Hypo|Hyper Lemna minor, common duckweed, lesser duckweed of temperate regions except eastern Asia and Australia Lemna trisulca, star-duckweedcosmopolitan in temperate regions except North America Spirodela polyrrhiza, great duckweed, water flaxseedcosmopolitan except South America and New Zealand and some oceanic islands watermealany of various aquatic plants of the genus Wolffia; throughout warmer regions of the world Wolffiella gladiata, bogmat, mud midgethaving narrow flat sickle-shaped submerged fronds; North America Wolffia columbiana, common wolffiasmallest flowering plants known; of the Americas aquatic plant, hydrophyte, hydrophytic plant, water plant a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth |
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