Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
half-moon is a noun meaning "the crescent-shaped area at the base of the human fingernail". It carries 2 recorded senses.
the time at which the Moon is at first or last quarter when half its face is illuminated
Definitions, synonyms and semantic relations for half-moon come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.