boulder clay boulder belt • boulder fern · · · Info · Definitions · Synonyms · Characters · · boulder clay · · Text Common · · Latin · · Scripts 12 · · Length Definitions · · · (noun) unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together. Synonyms: till. · · Noun Definition 1 Synonyms · · · boulder · · Synonym 1 bowlder · · 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 d latin small letter d U+0064 e latin small letter e U+0065 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 u latin small letter u U+0075 y latin small letter y U+0079