hor·rip·i·la·tion 
(hô-rĭp′ə-lāshən, hŏ-)
(hô-rĭp′ə-lāshən, hŏ-)n.
The bristling of the body hair, as from fear or cold; goose bumps.
[Late Latin horripilātiō, horripilātiōn-, from Latin horripilātus, past participle of horripilāre, to bristle with hairs : horrēre, to tremble + pilāre, to grow hair (from pilus, hair).]
hor·ripi·late′ v.