Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
filamentous is an adjective meaning "thin in diameter; resembling a thread". It carries one recorded sense.
thin in diameter; resembling a thread
Definitions, synonyms and semantic relations for filamentous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.