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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

object, physical object go
a tangible and visible entity

whole, unit go
an assemblage of parts that is regarded as a single entity

living thing, animate thing go
a living (or once living) entity

organism, being go
a living thing that has (or can develop) the ability to act or function independently

plant, flora, plant life go
(botany) a living organism lacking the power of locomotion

vascular plant, tracheophyte go
green plant having a vascular system: ferns, gymnosperms, angiosperms

aquatic plant, water plant, hydrophyte, hydrophytic plant go
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

duckweed
any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds

noun.plant

5 Subcategories

common duckweed, lesser duckweed, Lemna minor go
of temperate regions except eastern Asia and Australia
star-duckweed, Lemna trisulca go
cosmopolitan in temperate regions except North America
great duckweed, water flaxseed, Spirodela polyrrhiza go
cosmopolitan except South America and New Zealand and some oceanic islands
watermeal go
any of various aquatic plants of the genus Wolffia
mud midget, bogmat, Wolffiella gladiata go
having narrow flat sickle-shaped submerged fronds