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Definition of Alga
1. Noun. Primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves.
Generic synonyms: Protoctist
Specialized synonyms: Seaweed, Golden Algae, Yellow-green Algae, Diatom, Confervoid Algae, Brown Algae, Euglenid, Euglenoid, Euglenophyte, Chlorophyte, Green Algae, Chlorella, Red Algae, Cryptomonad, Cryptophyte
Derivative terms: Algal
Definition of Alga
1. n. A kind of seaweed; pl. the class of cellular cryptogamic plants which includes the black, red, and green seaweeds, as kelp, dulse, sea lettuce, also marine and fresh water confervæ, etc.
Definition of Alga
1. Noun. (biology) Any of many aquatic photosynthetic organisms, whose size ranges from a single cell to giant kelps and whose form is very diverse; some are eukaryotic and some prokaryotic; includes the seaweeds. ¹
¹ Source: wiktionary.com
Definition of Alga
1. any of a group of primitive aquatic plants [n -GAE or -GAS] : ALGAL [adj]
Medical Definition of Alga
1.
Origin: L, seaweed.