The Collaborative International Dictionary of English v.0.48:
Longheaded \Long"head"ed\, a. 1. Having unusual foresight or sagacity. [1913 Webster] 2. having a relatively long head with a cephalic index of under 75. Opposite of brachycephalic. Syn: dolichocephalic, dolichocranal, dolichocranic. [WordNet 1.5 +PJC] -- Long"-head`ed*ness, n. [1913 Webster]