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amount measure; quantity. [3 definitions]
ampersand a sign (&). It is used in place of the word "and."
amphibian a small animal that spends part of its life cycle in water and part of its life cycle on land. Amphibians hatch in water and breathe with gills. Then they develop lungs so the adults can breathe air. Amphibians are cold-blooded animals with skeletons inside their bodies. Frogs, toads, and salamanders are amphibians. [2 definitions]
amphibious able to live both on land and in water. [2 definitions]
amphitheater an oval or round building with seats rising in rows from an open, central area. Amphitheaters are used for sports and other public events.
amphitheatre a spelling of amphitheater used in Canada and Britain. See amphitheater for more information.
ample large in size, amount, or space; as much or more than is needed.
amplifier an electronic device used to make sound louder.
amplify to make larger or greater. [2 definitions]
amputate to cut off, especially by surgery.
Amsterdam the official capital city of the Netherlands. Most of the government of the Netherlands is located in another city, The Hague.
amt. an abbreviation for amount.
amuse to hold the interest of in a pleasant way; entertain. [2 definitions]
amusement something that amuses or entertains; fun. [2 definitions]
amusement park an outdoor place with games, rides, and other forms of entertainment.
-an a suffix that means "from," "belongs to," or "lives in." [2 definitions]
an another word for a. It is used before words that start with a, e, i, o, or u, or before words that begin with vowel sounds.
anaconda a very large snake found in South America. Anacondas are not poisonous but kill other animals by squeezing them until they cannot breathe. Anacondas can grow to over twenty feet long.
anaemia another spelling of anemia.
analog representing information by physical measurements.
analyse a spelling of analyze used in Canada and Britain. See analyze for more information.