| azithromycin |
an antibiotic derived from erythromycin that is used to treat bacterial infections. |
| azo- |
containing nitrogen. |
| azobenzene |
an orange-red, nonsoluble crystalline compound obtained from nitrobenzene, used in organic synthesis, as an insecticide, and in the making of dyes. |
| azoic |
see "Archean." |
| Aztec |
a member of an Indian people who had an advanced civilization in central Mexico before the Spaniards conquered them in 1519. [4 definitions] |
| azure |
the color of a clear blue sky; sky blue. [2 definitions] |
| azurite |
a bright azure-blue mineral that serves as a copper ore. [2 definitions] |
| azygous |
in biology, not being part of a pair; occurring singly. |
| B |
symbol of the chemical element boron. |
| B- |
in the U.S. military, a plane used to transport and drop bombs, such as a B-17 or B-52. |
| b |
the second letter of the English alphabet. [5 definitions] |
| b. |
abbreviation of "born," brought into life by birth or in like manner (used to indicate the year or date of a birth). |
| B-1 |
a heavy U.S. jet bomber built for the 1980s. |
| B-17 |
a four-engine U.S. bomber extensively used in World War II; Flying Fortress. |
| B-29 |
a heavy U.S. bomber used late in World War II; Superfortress. |
| B-52 |
a heavy U.S. bomber with eight jet engines. |
| Ba |
symbol of the chemical element barium. |
| B.A. |
abbreviation of "Bachelor of Arts," an undergraduate degree conferred on a person who has completed a curriculum in the liberal arts; A.B. |
| baa |
to make the sound of a sheep; bleat. [2 definitions] |
| Baal |
any of various local deities, usu. fertility gods, worshiped by certain ancient Semitic peoples. [2 definitions] |
| baba au rhum |
a light, porous cake, usu. made with yeast and sometimes containing raisins or other dried fruit, that is soaked with rum before serving. |