vertex
ver.tex \'v*r-.teks\ \'v*rt-*-.se-z\ n or ver.tex.es or ver.ti.ces [L vertic, vertex, vortic-, vortex whirl, whirlpool, to] pl p of the head, summit, fr. vertere to turn 1a1: the point opposite to and farthest from the base in a figure 1a2: the termination or intersection of lines or curves 1b: ZENITH 2: the top of the head 3: a principal or highest point : SUMMIT, APEX {a monument on the ~ of the hill}