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The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories ( For more information about these ontologies, see the MGI Publications Page at

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Accession:MP:0000561 term browser browse the term
Definition:missing one or more digits, or all digits
Comment:There is ambiguity in the literature regarding the meaning of the term adactyly. Some sources define this as missing all digits and other sources list the definition as missing all or one or more digits. In this ontology, we are using the latter, more inclusive definition, even though this may confound the usage of the term oligodactyly MP:0000565.
Synonyms:exact_synonym: absence of digits
 narrow_synonym: absent fingers;   absent toes
 xref: Fyler:4173

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  mammalian phenotype 5373
    limbs/digits/tail phenotype 76
      abnormal limb morphology 67
        abnormal autopod morphology 18
          abnormal digit morphology 11
            adactyly 0
              absent hallux 0
paths to the root