Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
snow-on-the-mountain is a noun meaning "annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk". It carries one recorded sense.
annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk
Definitions, synonyms and semantic relations for snow-on-the-mountain come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.