X Vertex

1. whirl, whirlpool, eddy, vortex
2. eddy of wind or flame, whirlwind, coil of flame
3. (literally, anatomy) top, crown of the head
4. (poetic) head
5. pole of the heavens (north or south)
6. highest point, top, peak, summit (of a mountain, house, tree, etc.)
7. (figuratively, poetic) highest, uttermost, greatest