| alpha and omega |
the first and last letters of the Greek alphabet. [2 definitions] |
| alphabet |
the letters of a written language, esp. if in the standard or customary order. [2 definitions] |
| alphabetic |
of, pertaining to, or using an alphabet. [2 definitions] |
| alphabetical |
pertaining to or arranged according to the standard order of an alphabet. [2 definitions] |
| alphabetize |
to arrange according to the standard order of an alphabet. |
| Alpha Centauri |
a double star in the constellation Centaurus, the closest star to the solar system, having a combined magnitude of -0.3. |
| alphanumeric |
in computer terminology, consisting of both letters and numbers or other nonalphabetic symbols. |
| alpha particle |
a positively charged particle given off as radiation from some fission or decay processes, consisting of two protons and two neutrons. |
| alpha ray |
radiation composed of alpha particles. |
| alpha wave |
the type of brain wave that is a sign of relaxation, having frequencies from eight to thirteen hertz; alpha rhythm. |
| Alpheratz |
a bright star in the constellations Pegasus and Andromeda, having a magnitude of 2.0. |
| alphorn |
see "alpenhorn." |
| Alpine |
(l.c.) of, like, living in, or characteristic of high mountains or mountain regions above the timberline. [4 definitions] |
| alpinist |
one who climbs in the Alps or other similar mountains. [2 definitions] |
| Alps |
a high mountain range extending from southern France through Switzerland, Italy, Germany, and Austria, and into the Balkan region and Albania. |
| already |
by or before this time or that time; previously. [3 definitions] |
| alright |
all right; unharmed or undamaged, or free of the risk of harm or damage. [4 definitions] |
| Alsatian |
one of a breed of large dogs having a thick brownish or black coat, often used as guard dogs and as guide dogs for the blind; German shepherd. |
| also |
in addition; as well; too. [3 definitions] |
| also-ran |
(informal) one who lost in an athletic or political competition. |
| alt.1 |
abbreviation of "alternate," one authorized to act in place of another; substitute. |