alga
noun
any organism belonging to one of the numerous groups of algae.
algal
-
a word derived from
alga.
-
a word derived from
algae.
algaeplural nounany of numerous groups of chlorophyll-containing, mainly aquatic, eukaryotic organisms ranging from microscopic single-celled forms to multicellular forms 100 feet (30 meters) or more long, distinguished from plants by the absence of true roots, stems, and leaves and by a lack of nonreproductive cells in the reproductive structures: classified into the six phyla Euglenophyta, Crysophyta, Pyrrophyta, Chlorophyta, Phaeophyta, and Rhodophyta.
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.
Scientists have already connected them with widespread coral bleaching, large-scale deaths of marine organisms, harmful algal blooms and major disruptions to fisheries and aquaculture.
From Science Daily ● Aug. 11, 2026
In 2025, the toxic algal bloom in South Australia was associated with high levels of 'eco-anxiety,' as well as grief, frustration and depression.
From Science Daily ● Aug. 11, 2026
Results indicate that, as temperatures rise, future algal blooms in this region may not follow the same trajectory as those at the more widely studied Greenland Ice Sheet, which regularly experiences large-scale glacier algal blooms.
From BBC ● Jun. 30, 2026
Due to stormier weather this year, large-scale algal blooms have not yet formed on Lough Neagh to the same extent as the previous three summers.
From BBC ● Jun. 27, 2026
The algal host cells lie in the medulla, just below the upper cortex.
From Ohio Biological Survey, Bull. 10, Vol. 11, No. 6 The Ascomycetes of Ohio IV and V by Leafy Jane Corrington Hilker
