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| aardvark |
a large mammal with a long snout, long ears, a long tail, and with long fur mostly around its legs. Aardvarks are active at night, when they use their powerful claws to dig open ant or termite nests. They catch their food with their long, sticky tongue. Aardvarks live in southern and central Africa. Although they are sometimes called anteaters, aardvarks are not closely related to any other kind of mammal. |
| abacus |
a device used for counting or calculating. An abacus has beads or other counters that slide along rods or in grooves. |
| abortifacient |
a drug or other agent used to cause abortion. [1/2 definitions] |
| above |
in an earlier place in a book or other piece of writing. [1/9 definitions] |
| absentee |
a person who is absent from work, school, or other duty. |
| absent-minded |
tending to not pay attention to a task or event because one is thinking about other things. |
| A/C |
abbreviation of "air conditioning," a system that circulates cooled and dehumidified air in a building, car, or other space. |
| account |
an arrangement wherein a bank or other financial institution holds a customer's deposited funds so that the funds are safe but can be accessed at any time by the customer, or the conception of this arrangement as a container for the funds that are kept. [3/16 definitions] |
| ace |
a serve in tennis that wins a point because the other player can not reach the ball. [1/5 definitions] |
| acetate |
a textile fabric, plastic, or other product made from cellulose acetate. [1/2 definitions] |
| acetic acid |
a clear, colorless, sour liquid compound that is the main ingredient in vinegar and is used in solvents, acetate fibers, plastics, and other products. |
| across |
from one side of something to the other side. [4/5 definitions] |
| acrylic |
a kind of plastic used to make yarns, paint, and many other things. |
| act |
a short performance, or one part of a whole performance, of music, dance, or other entertainment. [1/4 definitions] |
| ACTH |
a hormone produced by the anterior pituitary that stimulates the cortex of the adrenal gland to produce cortisone and other hormones; adrenocorticotropic hormone. |
| actinomycin |
any of several antibiotics derived from soil bacteria that work against certain other bacteria and fungi. |
| activated carbon |
a form of very porous and thus very absorbent carbon, produced by heating charcoal so as to empty out contained gases, and used to absorb other gases, recover solvents, deodorize, and the like; activated charcoal. |
| addend |
a number added to one or more other numbers to form a sum. |
| addendum |
an addition or intended addition, esp. a supplement to a book or other document. |
| address |
a formal speech, lecture, or other communication. [1/9 definitions] |
| adhesive tape |
a long, thin piece of cloth or plastic with a sticky material on one side. You use adhesive tape to attach things to each other. |
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