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-in-summer is a noun meaning "annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk". It carries 2 recorded senses.
annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk
chickweed with hairy silver-grey leaves and rather large white flowers
Definitions, synonyms and semantic relations for snow-in-summer come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.