| 22nd Amendment |
an amendment to the U.S. Constitution that ensures that no person can be elected to more than two four-year terms as President of the United States. The 22nd Amendment, ratified in 1951, was passed in reaction to President Franklin D. Roosevelt's four terms in office. |
| accidental |
in music, a symbol that indicates that a note should be played or sung one or two semitones higher or lower than is otherwise indicated. In most cases, the pitch is to be raised or lowered by one half step, as from F natural to F sharp. [2/5 definitions] |
| acey-deucy |
a form of backgammon that assigns a special value to a throw of a one or a two. |
| add |
to use mathematics to find the total of two or more numbers. [1/3 definitions] |
| addition |
the process of finding the total of two or more numbers. [1/2 definitions] |
| addition table |
a table that can be used to find the sum of two numbers. |
| à deux |
(French) of or for two, esp. in an intimate or private manner. |
| adjacent angles |
two angles that have a common vertex and one common side. |
| adrenal gland |
either of two small glands of different shapes, located above the kidneys, that secrete adrenaline and various steroid hormones. |
| adversarial |
pertaining to or involving opposition between two sides. [1/2 definitions] |
| affair |
a love relationship, especially one between two people who are not married to each other. [1/3 definitions] |
| agreement |
in grammar, correspondence between the number, person, or grammatical gender of two syntactically connected words, esp.that of subject and verb or adjective and noun. [1/5 definitions] |
| air lock |
an airtight compartment in which the air pressure can be regulated, usu. situated between two areas that have different air pressures, as in underwater operations. [1/2 definitions] |
| Aleut |
either of two languages related to Eskimo and spoken by such natives. [1/2 definitions] |
| Algonkian |
of, relating to, or designating the later of two geological periods of the Precambrian Era, from approximately 2.5 billion to 600 million years ago, when the first evidence of life appeared; Late Precambrian; Proterozoic. [1/4 definitions] |
| alley1 |
the space between the two outer sets of lines on each side of a tennis court, used only in doubles. [1/5 definitions] |
| allied |
under treaty, as two nations. [1/3 definitions] |
| alligator |
either of two large crocodilian reptiles found in China and the southeastern United States and distinguished by their short broad snouts. |
| alloy |
a substance made by mixing two or more metals or a metal and another substance. |
| alpha particle |
a positively charged particle given off as radiation from some fission or decay processes, consisting of two protons and two neutrons. |
| alternate |
to move back and forth between two or more places, actions, or conditions (usually followed by "between"). [2/7 definitions] |