lower mantle lower limit • lower-middle-class · · · Info · Definitions · Characters · · lower mantle · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) the deeper part of the mantle. Synonyms: lower mantle. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 w latin small letter w U+0077