dolichocephalic
adjective
dol·i·cho·ce·phal·ic ˌdä-li-kō-sə-ˈfa-lik 
: having a relatively long head with cephalic index of less than 75
dolichocephaly
ˌdä-li-kō-ˈse-fə-lē
noun 
Word History
Etymology
New Latin dolichocephalus long-headed, from Greek dolichos long + -kephalos, from kephalē head — more at cephalic
First Known Use
1852, in the meaning defined above
Medical Definition
dolichocephalic
adjective
dol·i·cho·ce·phal·ic -sə-ˈfal-ik
: having a relatively long head with a cephalic index of less than 75