Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
time-ball is a noun meaning "a ball that slides down a staff to show a fixed time; especially at an observatory". It carries one recorded sense.
Definitions, synonyms and semantic relations for time-ball come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.