Intellectual disability UMLS:C0423903 Low intelligence Mental retardation, nonspecific SNOMEDCT_US:228156007 Mental retardation HP:0007180 HP:0002402 UMLS:C1843367 Dull intelligence UMLS:C4020876 HP:0001286 Poor school performance human_phenotype HP:0002499 HP:0001267 HP:0006877 HP:0006833 HP:0002192 Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70. UMLS:C0025362 UMLS:C3714756 Intellectual disability SNOMEDCT_US:91138005 Mental deficiency MSH:D008607 Nonprogressive mental retardation HP:0002316 Mental-retardation HP:0002458 HP:0003767 HP:0000730 HP:0001249 Nonprogressive intellectual disability This term should be used for children at least five years old. For younger children, consider the term Global developmental delay (HP:0001263). HP:0002386 HP:0002122 HP:0002482 HP:0002543 UMLS:C0917816 SNOMEDCT_US:247578003 HP:0007176 HP:0007154 HP:0002382 Abnormality of higher mental function Neurodevelopmental abnormality