hor·rip·i·la·tion (hô-rĭp′ə-lāshən, hŏ-)
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).]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.