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| 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. |
| 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. |
| acre |
a unit of area equal to 43,560 square feet or 4,047 square meters, used in measuring land. [1/2 definitions] |
| activate |
to assign (a military unit) to active status. [1/6 definitions] |
| afghani |
the chief monetary unit of Afghanistan, equaling one hundred puls. |
| agora2 |
the smaller monetary unit of Israel. (Cf. shekel.) |
| aidman |
an enlisted medical corpsman attached to a combat unit. |
| air command |
a major unit in a military air force, esp. in the United States. |
| amalgamate |
to combine or blend into a single unit. [1/4 definitions] |
| ampere |
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. (abbr.: A, amp) |
| angstrom |
(often cap.) a unit of length equal to one hundred-millionth of a centimeter, used in measuring light waves; angstrom unit. (abbr.: A, A.U.) |
| are2 |
a unit of area equal to one hundred square meters or 119.6 square yards. |
| armament |
weapons and supplies used to equip a military unit such as a tank, warship, airplane, or the like. [1/4 definitions] |
| arrondissement |
in France, the highest administrative unit within a department. [1/2 definitions] |
| as2 |
an ancient Roman unit of weight equal to approximately twelve ounces; libra. [1/2 definitions] |
| astronomical unit |
a unit of length based on the average distance of the earth from the sun, equal to about 149.6 million kilometers or ninety-three million miles. |
| astronomical year |
a unit of time equal to the period between one vernal equinox and the next. |
| at2 |
the smaller monetary unit of Laos. (Cf. kip.) |
| atom |
an invisible component of any element, consisting of protons, neutrons, and electrons, once considered the smallest possible unit of matter. [1/2 definitions] |
| atomic mass unit |
a unit equal to one twelfth of the mass of an atom of the most abundant kind of carbon, equal to 1.6605 times 1024 gram. |
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