Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
ecoterrorism is a noun meaning "violence carried out to further the political or social objectives of the environmentalists". It carries one recorded sense.
violence carried out to further the political or social objectives of the environmentalists
terrorism
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 ecoterrorism come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.