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| Acapulco |
a port city on the Pacific coast of southern Mexico, known for its resorts and water sports. |
| acetamide |
a colorless water-soluble crystalline solid used esp. in forming organic compounds. |
| acid |
a chemical substance that dissolves in water, has a sour taste, and turns blue litmus paper red. [1/4 definitions] |
| afloat |
on the water; floating. |
| aground |
on or onto ground, esp. under water. [2 definitions] |
| albumin |
any of a class of proteins soluble in water and coagulating in heat, found in egg white, blood, milk, and various plant and animal tissues. |
| 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 algae. "Algae" is a plural noun; the singular form is "alga." |
| alligator |
a large reptile with short legs, a long body and tail, and a long, wide snout. Alligators are protected by thick skin with many hard bumps. They live in rivers, lakes, swamps, and other bodies of water in the southeast United States and in China. They usually eat insects, fish, turtles, snakes, birds, and other water animals, but have been known to attack small land mammals. They are closely related to crocodiles. Chinese alligators are endangered because their habitat is being changed by people. |
| alluvial |
of or pertaining to a flood plain or to sediment deposited by flowing water. |
| alluvium |
sand, soil, gravel, or the like deposited by moving water, as along a river bed. (Cf. eluvium.) |
| aluminum hydroxide |
a white, water-insoluble powder used as an antacid and to waterproof fabric and manufacture glass. |
| aluminum sulfate |
a white, water-soluble substance used to purify water, manufacture paper, and fix dyes. |
| ammonia |
a liquid with a strong smell made from a chemical gas and water. Ammonia is used in some cleaning products and in fertilizers. |
| ammonium hydroxide |
a colorless basic solution produced by dissolving ammonia in water, used as a household cleaner and in the production of textiles, plastic, and the like. (See ammonia.) |
| ammonium sulfate |
a water-soluble salt, used mainly to purify water and as a fertilizer. |
| 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. |
| amphibian |
a small animal that is born in water and then lives on land for part of its life. Frogs and toads are kinds of amphibians. |
| amphibious |
able to live both on land and in water. [2 definitions] |
| anchor |
a heavy device, connected by a cable to a boat or ship, that is dropped to the bottom of a body of water to restrict the vessel's motion. [1/7 definitions] |
| anhydride |
a chemical compound derived from another through the removal of water. |
| anhydrous |
without water. |
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