noun pl. apexes a′pex′·es or apices ap′i·ces′ (ap′ə sēz′, ā′pə-)

1. the highest point; peak; vertex
2. the pointed end; tip
3. the highest point of interest, excitement, etc.; climax
4. ☆ Mining the edge or outcrop of a vein nearest the surface

Etymology: L, a point; prob. < apere, to fasten: see apt