infant mortality rate infant mortality • infant prodigy · · · Info · Definitions · Synonyms · Characters · · infant mortality rate · · Text Common · · Latin · · Scripts 21 · · Length 7 · · Syllables Definitions · · · (noun) the death rate during the first year of life. Synonyms: infant deathrate, infant mortality, infant mortality rate. · · Noun Definition 1 Synonyms · · · infant deathrate · · Synonym 1 infant mortality · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 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 y latin small letter y U+0079