episperm epispastic • epispermic · · · Info · Definitions · Synonyms · Characters · · episperm · · Text Latin · · Script 8 · · Length Definitions · · · (noun) protective outer layer of seeds of flowering plants. Synonyms: testa, seed coat. · · Noun Definition 1 Synonyms · · · testa · · Synonym 1 seed coat · · Synonym 2 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073