Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
single-celled is an adjective meaning "having a single cell (and thus not divided into cells)". It carries one recorded sense.
having a single cell (and thus not divided into cells)
Definitions, synonyms and semantic relations for single-celled come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.