aculeus aculeolus • acumen · · · Info · Definitions · Characters · · aculeus · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a stiff sharp-pointed plant process. · · Noun Definition 1 (noun) a sharp-pointed process especially a sting of a hymenopterous insect. · · Noun Definition 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 l latin small letter l U+006C s latin small letter s U+0073 u latin small letter u U+0075