| Altaic |
a family of languages that includes Turkic, Mongolian, Tungusic, and Korean. [3 definitions] |
| Altai Mountains |
a central Asian mountain range that extends from western Mongolia into Russia and China. |
| Altair |
the brightest star in the constellation Aquila, having a magnitude of 0.8. |
| altar |
a raised structure, often a table or platform, upon or at which sacrifices or other religious ceremonies are performed. |
| altar boy |
a young male person who assists the clergy in religious services; acolyte. |
| altar girl |
a young female person who assists the clergy in religious services; acolyte. |
| altarpiece |
a work of art that decorates the area above and behind an altar. |
| altazimuth |
a telescope or other instrument that moves in altitude (up and down) and in azimuth (back and forth). |
| alter |
to make different; change. [2 definitions] |
| alterable |
capable of being changed or altered. |
| alterant |
resulting in or producing alteration. [2 definitions] |
| alteration |
the state or process of altering. [3 definitions] |
| alterative |
tending to alter or cause alteration. |
| altercate |
to argue heatedly; quarrel. |
| altercation |
a loud or angry argument or quarrel. |
| alter ego |
a second self or another aspect of oneself. [2 definitions] |
| alternate |
to continuously rotate or take turns with one another (usu. fol. by "with"). [9 definitions] |
| alternate angles |
a pair of nonadjacent angles that are formed on opposite sides of a line where it crosses two others transversely. |
| alternating current |
electrical current that reverses direction at regular intervals. (Cf. direct current.) |
| alternation |
the act or process of alternating. [2 definitions] |
| alternative |
one of two or more possibilities; option. [5 definitions] |