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.
any structural anomaly of the fibrous connective tissue that surrounds the root of a tooth, separating it from and attaching it to the alveolar bone; normally extends from the base of the gingival mucosa to the fundus of the bony socket, and its main function is to hold the tooth in its socket