blue-green
/ˌbluːˌɡriːn ˈæl.ɡiː/ (bre, ipa) · /ˌbluːˌɡriːn ˈæl.ɡiː/ (ame, ipa)
blue-green — noun
1. a very small organism that lives in water, often forming a blue-green layer on w
a very small organism that lives in water, often forming a blue-green layer on warm lakes and sometimes releasing poison
By August, blue-green had formed a thick layer across the village lake.
blue-green + form a thick layer
The ranger warned Christopher that blue-green in the bay could poison dogs.
blue-green + could poison animals
After three hot days, blue-green spread near the beach beside the pier.
Aylin saw blue-green floating where the children usually paddle after school.
Tests showed blue-green in the reservoir had made two cows sick.
- cyanobacteria
the scientific name for this group, common in biology and water testing
- algae
a broader word that includes many water plants and organisms, not only this harmful kind
- pond scum
an informal and negative label for ugly green growth on still water
文法句型
blue-green spreads across a lake
blue-green can poison animals
用法筆記
Often used in reports about lake safety and water quality. In everyday English, many people say blue-green algae or use the scientific name cyanobacteria instead.