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