blue-green
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
GUILIN, China—More than a millennium ago, the Tang dynasty writer Han Yu said of Guilin’s landscape, “The river forms a blue-green silk ribbon, the mountains are like jade hairpins.”
From The Wall Street Journal ● Sep. 8, 2026
The authority said recent testing had confirmed the presence of blue-green algae, a naturally occurring phenomenon that can develop in still water during prolonged periods of hot weather and which can be harmful to wildlife.
From BBC ● Aug. 4, 2026
Sue Schwar, the founder of South Essex Wildlife Hospital, said she was "100% sure" the deaths had been caused by exposure to blue-green algae.
From BBC ● Aug. 4, 2026
In July 2025, testing found Canvey Lake contained 2.5 million cells of blue-green algae per millilitre, more than 100 times the warning threshold of 20,000 cells.
From BBC ● Aug. 4, 2026
For most of the four billion years since the origin of life, the dominant organisms were microscopic blue-green algae, which covered and filled the oceans.
From "Cosmos" by Carl Sagan
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