Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
star-duckweed is a noun meaning "cosmopolitan in temperate regions except North America". It carries one recorded sense.
cosmopolitan in temperate regions except North America
Definitions, synonyms and semantic relations for star-duckweed come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.