. | 1. | the tip, point, or vertex; summit. |
| 2. | climax; peak; acme: His election to the presidency was the apex of his career. |
| 3. | Astronomy. solar apex. |

a·pex (ā'pěks) n. pl. a·pex·es or a·pi·ces (ā'pĭ-sēz', āp'ĭ-)
[Latin.] |
apex a·pex (ā'pěks)
n. pl. a·pex·es or a·pi·ces (ā'pĭ-sēz', āp'ĭ-)
The pointed end of a conical or pyramidal structure.
| APEX Arctic Polynya Experiment |