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| 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." |
| amoeba |
a tiny living thing made of only one cell. Amoebas move by changing their shape. They eat by wrapping their bodies around their food. Amoebas live in fresh and salt water, soil, and in animals. Most kinds of amoebas can only be seen through a microscope. |
| focus |
The focus on something like a camera or microscope is a way of adjusting it so that the device can give a clear image of what you see through the lens. [1/6 definitions] |
| instrument |
An instrument is a tool or device used for special work or for a very special purpose. A microscope is an example of an instrument. It is an instrument for looking at things that are very small. Scientists, doctors, and dentists use many kinds of instruments. [1/3 definitions] |
| microbe |
A microbe is a tiny life form that can only be seen with a microscope. Many microbes are germs that cause disease. |
| microorganism |
any life form so small that it can only be seen with a microscope. Microorganisms include bacteria, viruses, and many protozoans. |
| microscope |
A microscope is something that makes things look much bigger than they really are. A microscope can make very tiny things look large enough for you to see them. |
| microscopic |
having to do with a microscope. [1/2 definitions] |
| naked |
When you can see something with your naked eye, you can see it without the help of any lenses to make your sight better. You don't need a microscope or a telescope. [1/3 definitions] |
| paramecium |
a living thing made of one cell that lives in fresh water. Paramecia can only be seen through a microscope. Paramecia are protozoans, tiny organisms that are similar to animals. |
| prefix |
A prefix is a part of a word with its own meaning that is added to the beginning of another word to make a new word. In the word "precook," for example, "pre-" is a prefix that means "before." If something is "precooked," it means that it is already cooked and you don't need to cook it. In the word "microscope," "micro-" is a prefix that means "small." If you use a "microscope," you can see things that are very small. |
| slide |
a small piece of glass that holds an item so that it can be looked at under a microscope. [1/11 definitions] |
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