[jug.u.lar] adj [LL jugularis, fr. L jugulum collarbone, throat, fr. jugum yoke] (1597) 1: of or relating to the throat or neck
2: of or relating to the jugular vein
[2]jugular n (1615) 1: jugular vein
2: the most vital or vulnerable part of something "showed an instinct for the ~ in competition"