Monarch Disease Ontology term MONDO_0019181 (non-syndromic X-linked intellectual disability) is nonspecific X-linked intellectual deficiencies (MRX) belong to the family of sex-linked intellectual deficiencies (XLMR). In contrast to syndromic or specific X-linked intellectual deficiencies (MRXS), which also present with associated physical, neurological and/or psychiatric manifestations, intellectual deficiency is the only symptom of MRX. Also known as: X-linked non-specific intellectual disability, X-linked non-syndromic intellectual disability, intellectual disability, X-linked, nonsyndromic, intellectual disability, nonsyndromic, X-linked, mental retardation, X-linked, nonsyndromic, mental retardation, nonsyndromic, X-linked, non-specific X-linked intellectual disability, non-specific X-linked mental retardation.