Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
fenestral is an adjective meaning "of or relating to or having a fenestra". It carries 2 recorded senses.
of or relating to or having a fenestra
anatomy
of or relating to windows
Definitions, synonyms and semantic relations for fenestral come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.