blue-green
Americannoun
Etymology
Origin of blue-green
First recorded in 1850–55
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.
Last year, scientists in the country announced they had launched successful trials spraying the soil with cyanobacteria, also known as "blue-green algae" -- a method that helps retain moisture and facilitate tree rooting.
From Barron's • Dec. 18, 2025
A small robot wearing a bear hat threw punches and a blue-green robot, resembling an anime character, moved its head and arms.
From Los Angeles Times • Dec. 17, 2025
These findings show that marine algae have evolved specialized pigments not only to absorb the blue-green light available underwater but also to withstand the damaging effects of intense sunlight.
From Science Daily • Oct. 22, 2025
In recent years large blooms of potentially toxic blue-green algae in Lough Neagh – caused in large part by long-term pollution – have grabbed the headlines.
From BBC • Sep. 24, 2025
In the mornings, she opened her eyes and saw these blue-green sheets and that painting of the sea.
From "Genuine Fraud" by E. Lockhart
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
