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| 11th Amendment |
an amendment to the U.S. Constitution that guarantees a level of sovereign immunity to states by forbidding federal courts from ruling on cases brought against a state by a citizen of another state. |
| 3-D |
a method or medium for producing or showing images in, or as if in, three dimensions. [1/2 definitions] |
| 4WD |
abbreviation of "four-wheel drive," a car that drives by means of all four wheels rather than the rear wheels only, or the drive system of such, in which both front and rear wheel axles are turned by the drive shaft. |
| A2 |
abbreviation of "ampere" or "amperes," a unit of electrical current that refers to the quantity of current that passes through a resistor of one ohm when a potential of one volt is applied, equal to one coulomb per second. |
| A3 |
abbreviation of "angstrom" or "angstroms," a unit of length equal to one hundred-millionth of a centimeter, used in measuring light waves. |
| a1 |
a grade given for excellent schoolwork. [2/3 definitions] |
| a2 |
any one of a group or kind. [3 definitions] |
| a.1 |
abbreviation of "acre" or "acres," a unit of area equal to 43,560 square feet or 4,047 square meters, used in measuring land. |
| a-1 |
a prefix that means "on," "at," "into," or "to." |
| a-2 |
a prefix that means "away," "from," or "off." [2 definitions] |
| AA |
abbreviation of "Alcoholics Anonymous," a world-wide recovery program for alcoholics, administered through chapters. |
| A.A. |
abbreviation of "Associate in Arts," an undergraduate degree conferred on a person who has completed a curriculum in the liberal arts. |
| 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. |
| aardwolf |
a striped, nocturnal African mammal of the hyena family that feeds primarily on insects. |
| AB2 |
abbreviation of "Assembly Bill," in the U.S., a proposed law in consideration by a state assembly. |
| aba |
a coarse felted fabric of goat or camel hair. [2 definitions] |
| abaca |
a Philippine plant of the banana family that yields a fiber used in making rope. |
| aback |
of a sail, positioned so that the wind pushes against the front side. [1/2 definitions] |
| abacus |
a device used for counting or calculating. An abacus has beads or other counters that slide along rods or in grooves. |
| Abaddon |
in the Old Testament, a place of destruction; abode of the wicked dead; hell. [1/2 definitions] |
| abalone |
a large sea snail that has several shiny colors on the inside of its shell. Abalone are mollusks. People eat abalone meat and make decorations from the shells. |
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