A closeup of algae covered rocks in a stream.
The definition of algae is a single or multi-cellular organism that has no roots, stems or leaves and is often found in water.
Facts About Algae
- Algae are photosynthetic organisms, meaning they use sunlight and chlorophyll to make food.
- At one time, algae were thought to be plants, but are not because they lack roots, stems and leaves.
- They live all over the world, from the oceans to the desert, and from hot springs to snow and ice.
- Many things eat algae, including: fish, sea urchins, worms, snails, sea turtles, seals, crustaceans, and even humans.
- Seaweed is highly nutritious, delicious, and can be cooked with pasta, put in salads, used in meat dishes, all because of its versatility.
- Examples of algae are seaweed, kelp, and red, brown and green algae.
- An example of algae in the Pacific Ocean are the giant kelps which growing over 65 yards in length, forming a marine forest.
- An example of algae is Alginate, made from brown algae, which is used as a thickener in many food products such as ice cream and salad dressings.
- An example of algae is agar, made from red algae, which is a thickener in food products and an ingredient in time-released drugs, laxatives, shampoos and fertilizers.
plural nounsing. alga
any of several divisions of simple photosynthetic organisms, esp. certain thallophytes, variously one-celled, colonial, or filamentous, containing chlorophyll and other pigments (esp. red and brown), and having no true root, stem, or leaf: algae are found in water or damp places, and include seaweeds and pond scum
Origin of algaeplural of Classical Latin alga, seaweed ; from Indo-European base an unverified form el-, an unverified form ol-, to be moldy, putrid from source Swedish ul, rancid, Dutch uilig, rotten
- plural form of alga