oak apple oak • oak bark · · · Info · Definitions · Characters · · oak apple · · Text Common · · Latin · · Scripts 9 · · Length 3 · · Syllables Definitions · · · (noun) oak gall caused by larvae of a cynipid wasp. Synonyms: oak apple. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 k latin small letter k U+006B l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070