The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
aberrant or incomplete formation of the part of a tooth that is implanted in the gum; the root is normally located below the neck of the tooth, covered by cementum rather than enamel, and attached by the periodontal ligament to the alveolar bone