Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
bark-louse is a noun meaning "any of several insects living on the bark of plants". It carries one recorded sense.
any of several insects living on the bark of plants
Definitions, synonyms and semantic relations for bark-louse come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.