Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
horripilation is a noun meaning "reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation". It carries one recorded sense.
reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for horripilation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.