fenestella feneration • Fenestellidae · · · Info · Definitions · Synonyms · Characters · · fenestella · · Text Latin · · Script 10 · · Length Definitions · · · (noun) oval or circular opening; to allow light into a dome or vault. Synonyms: lunette. · · Noun Definition 1 Synonyms · · · lunette · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074