spanish onion spanish oak • spanish oyster plant · · · Info · Definitions · Characters · · spanish onion · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) large mild and succulent onion; often eaten raw. Synonyms: Spanish onion. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073