acorn barnacle acorn • acorn chair · · · Info · Definitions · Synonyms · Characters · · acorn barnacle · · Text Common · · Latin · · Scripts 14 · · Length 5 · · Syllables Definitions · · · (noun) barnacle that attaches to rocks especially in intertidal zones. Synonyms: acorn barnacle, rock barnacle, Balanus balanoides. · · Noun Definition 1 Synonyms · · · rock barnacle · · Synonym 1 balanus balanoides · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072