penumbrae penumbra • penumbral · · · Info · Definitions · Characters · · penumbrae · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a fringe region of partial shadow around an umbra. Synonyms: penumbra. · · Noun Definition 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 m latin small letter m U+006D n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072 u latin small letter u U+0075