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| alga |
"Alga" is the singular form of the word "algae." Algae are living things that live mainly in water and make their food by using light from the sun. Algae are similar to plants, but they are not usually considered to be plants because they are different in some ways. For example, algae don't have roots and leaves like plants do. Most forms of algae are very helpful for animals and people. Seaweed is a kind of algae, which many people eat and can also be used in making other things. Fish and other water animals use algae for food. |
| algae |
organisms that live mainly in the water and make their food through photosynthesis. Algae are different from plants in that they have no true leaves, roots, or stems. Seaweeds are one form of algae, but there are many others, including a large number that cannot be seen without a microscope. "Algae" is the plural form of the word "alga." |
| seaweed |
a kind of alga that grows in salt water. [1/2 definitions] |
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