What does "alga" mean?

Any of many aquatic photosynthetic organisms, including the seaweeds, whose size ranges from a single cell to giant kelps and whose biochemistry and forms are very diverse, some being eukaryotic.

What is a synonym for "alga"?

Common synonyms include: algae.

Alga

//ˈæl.ɡə// noun

noun ·Rare ·Advanced level

Definitions

Noun

1
Any of many aquatic photosynthetic organisms, including the seaweeds, whose size ranges from a single cell to giant kelps and whose biochemistry and forms are very diverse, some being eukaryotic.
"For example, the antitumour depsipeptide kahalalide F was isolated from the opisthobranch mollusc Elysia rufescens, and is used by both the mollusc and its dietary alga Bryopsis spp."
2
primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves wordnet

Synonyms

All synonyms

algae

Example

More examples

"For example, the antitumour depsipeptide kahalalide F was isolated from the opisthobranch mollusc Elysia rufescens, and is used by both the mollusc and its dietary alga Bryopsis spp."

Etymology

From Latin alga.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.