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Pronunciation varies by accent · noun
An annual plant, Polygonum aviculare, found in fields and wasteland.
Use knotgrass when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Knotgrass means An annual plant, Polygonum aviculare, found in fields and wasteland.
Common synonyms include centinode, water couch, paspalum distichum.
The opposite depends on the specific sense.
Use knotgrass where its definition matches the intended context.
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