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.
a condition in which a segment of the tympanic membrane (eardrum) collapses inwards towards the middle ear space and lies more medially (deeper) than its normal position; the retracted segment is often known as a retraction pocket